Send Information Between Delphi Apps With WM_COPYDATA

Send Information Between Delphi Apps With WM_COPYDATA There are many situation when you need to allow for two applications to communicate. If you do not want to mess with TCP and sockets communication (because both applications are running on the same machine), you can *simply* send (and properly receive) a special Windows message: WM_COPYDATA. Since handling Windows messages in Delphi is simple, issuing a SendMessage API call along with the WM_CopyData filled with the data to be sent is quite straight forward. WM_CopyData and TCopyDataStruct The WM_COPYDATA message enables you to send data from one application to another. The receiving application receives the data in a TCopyDataStruct record. The TCopyDataStruct is defined in the Windows.pas unit and wraps the COPYDATASTRUCT structure that contains the data to be passed. Heres the declaration and the description of the TCopyDataStruct record: type TCopyDataStruct packed record dwData: DWORD; //up to 32 bits of data to be passed to the receiving application cbData: DWORD; //the size, in bytes, of the data pointed to by the lpData member lpData: Pointer; //Points to data to be passed to the receiving application. This member can be nil. end; Send a String over WM_CopyData For a Sender application to send data to Receiver the CopyDataStruct must be filled and passed using the SendMessage function. Heres how to send a string value over WM_CopyData: procedure TSenderMainForm.SendString() ; var stringToSend : string; copyDataStruct : TCopyDataStruct; begin stringToSend : About Delphi Programming; copyDataStruct.dwData : 0; //use it to identify the message contents copyDataStruct.cbData : 1 Length(stringToSend) ; copyDataStruct.lpData : PChar(stringToSend) ; SendData(copyDataStruct) ; end; The SendData custom function locates the receiver using the FindWindow API call: procedure TSenderMainForm.SendData(const copyDataStruct: TCopyDataStruct) ; var   Ã‚  receiverHandle : THandle;   Ã‚  res : integer; begin   Ã‚  receiverHandle : FindWindow(PChar(TReceiverMainForm),PChar(ReceiverMainForm)) ;   Ã‚  if receiverHandle 0 then   Ã‚  begin   Ã‚  Ã‚  Ã‚  ShowMessage(CopyData Receiver NOT found!) ;   Ã‚  Ã‚  Ã‚  Exit;   Ã‚  end;   Ã‚  res : SendMessage(receiverHandle, WM_COPYDATA, Integer(Handle), Integer(copyDataStruct)) ; end; In the code above, the Receiver application was found using the FindWindow API call by passing the class name of the main form (TReceiverMainForm) and the caption of the window (ReceiverMainForm). Note: The SendMessage returns an integer value assigned by the code that handled the WM_CopyData message. Handling WM_CopyData - Receiving a String The Receiver application handles the WM_CopyData mesage as in: type TReceiverMainForm class(TForm) private procedure WMCopyData(var Msg : TWMCopyData) ; message WM_COPYDATA; ... implementation ... procedure TReceiverMainForm.WMCopyData(var Msg: TWMCopyData) ; var s : string; begin s : PChar(Msg.CopyDataStruct.lpData) ; //Send something back msg.Result : 2006; end; The TWMCopyData record is declared as: TWMCopyData packed record Msg: Cardinal; From: HWND;//Handle of the Window that passed the data CopyDataStruct: PCopyDataStruct; //data passed Result: Longint;//Use it to send a value back to the Sender end; Sending String, Custom Record or an Image? The accompanying source code demonstrates how to send a string, record (complex data type) and even graphics (bitmap) to another application. If you cannot wait the download, heres how to send a TBitmap graphics: procedure TSenderMainForm.SendImage() ; var ms : TMemoryStream; bmp : TBitmap; copyDataStruct : TCopyDataStruct; begin ms : TMemoryStream.Create; try bmp : self.GetFormImage; try bmp.SaveToStream(ms) ; finally bmp.Free; end; copyDataStruct.dwData : Integer(cdtImage) ; // identify the data copyDataStruct.cbData : ms.Size; copyDataStruct.lpData : ms.Memory; SendData(copyDataStruct) ; finally ms.Free; end; end; And how to receive it: procedure TReceiverMainForm.HandleCopyDataImage( copyDataStruct: PCopyDataStruct) ; var ms: TMemoryStream; begin ms : TMemoryStream.Create; try ms.Write(copyDataStruct.lpData^, copyDataStruct.cbData) ; ms.Position : 0; receivedImage.Picture.Bitmap.LoadFromStream(ms) ; finally ms.Free; end; end;

Topics in Physical Chemistry Essay Example | Topics and Well Written Essays - 3750 words

Topics in Physical Chemistry - Essay Example The understanding of chemical equilibrium has also advanced by different research studies thereby bringing new knowledge. Through exploration of different studies on the topic, this paper presents current study from peer reviewed journals and how research advance the studies in chemical equilibrium and its application. The use of computer simulations in the study of simple and long chain chemical reactions has also beenexplored. Finally, the paper explores the law of thermodynamics and how it applies to chemical equilibrium. Introduction Chemical reactions involve reactants and interacting under certain conditions to produce a product. It refers to the process of transforming a set of chemical compounds or substances to another or others with totally different identities. It involves the changes of the position of electrons with regards to formation or breaking of the bonds while the original elements always remain the same. Since there is no change in the original elements present, a chemical reaction can always be represented by an equation. Reagents or reactants are the initial substances that participate in a chemical reaction thus during a chemical reaction, there is always a change. This is because the new products exhibit different properties. New products may have differences with regard to physical, biological or chemical properties depending on the nature of chemical reaction. Chemical reaction equation must have the starting materials (reactants), conditions for reaction, intermediate products and finally the end products. However, there are certain chemical reactions that are very simple and do not need to pass through the intermediate product in order to get to the final product. In a chemical equation, we may have two different types of chemical reaction as well. Chemical reaction that takes place according to concentration and temperature at a specific rate is called non spontaneous while one that require no other conditions except thermal energy is known as spontaneous. This principle forms the basis of calculating the rate of reaction as well as managing it. In this respect, non spontaneous reaction is very slow and thus requires an additional energy or catalyst to increase its rate. Objective of the Study The objective of this study is to explore different literature and explore the current studies in chemical equilibrium. This paper aims at exploring studies in academic journals mainly focusing on equilibrium constant and its application in different industries. Chemical Reaction Chemical reactions can be well illustrated by chemical equations. Chemical equations consist of two or more reactants on the left side and the resultant products of that particular reaction on the right side. An arrow at the middle of the equation always represents the direction of reaction which can be either to the right or to the left depending on the conditions. It is therefore important to note that most chemical reactions are reversible r eactions. This is often represented by a double arrow which points on the both sides. The meaning of this is that products can also produce reactants depending on the concentrations and certain conditions. aA + bB cC + dD Irreversible reactions aA + bB cC + dD Reversible reactions The above equations shows the basic principle of a chemical reaction where A and B substances react to produce C and D substances. However, a, b, c and d

Mal-Adapted Essay Example | Topics and Well Written Essays - 1000 words

Mal-Adapted - Essay Example The mentioned contributions, however, are not exhaustive and are only intended to demonstrate the extent to which IT has become an integral part of corporate life and the business process. At the same time, however, IT functions as an organization's primary area of vulnerability as it is through their malicious use that attackers can infest an organization's system with viruses, worms, spyware and countless other types of malware (Gold, 2001; Rhode-Ousley, Bragg and Strassberg, 2003; Chen, Thompson and Elder, 2005). In light of dependency versus vulnerability, therefore, it is incumbent upon organization's and business entities to institute such protections as would shield the entity from such attacks. Sometimes, however, whether intentional or unintentional, the attack may come from within. Discussing the extent of my organization's vulnerability to malware with the head of the network and ICT department, I learnt that the company had been subjected to several attacks in the past, two of which were quite serious and, both caused by the activities of employees. As the head of the ICT department remarked as a prelude to his description of the attacks, two years ago and, in the wake of an external attacks which bordered on the catastrophic, the organization made a substantial investment in network security. At the department's recommendation, the organization's leadership consented to the implementation of third generation IA technologies which focused on in-depth defense. As explained by Liu, Yu, and Jing (2005, p. 112) this type of IA embraces all of as "(a) boundary controllers, such as firewalls and access control, (b) intrusion detection and (c) threat/attack/intrusion response." Upon the implementation of the defined system, the general assumption was that the organ ization was immune to external attacks and to malware. This, as evidenced by later events, was an erroneous assumption. The source of the first malware infestation suffered by the organization following the implementation of the defense in depth IA system, came from the Research an Development Department. The ICT department had initially recommended the securitization of the network against direct downloads from the internet, even at the explicit request and consent of users. The R&D department had vehemently argued against this, emphasizing that were such a security procedure to be implemented, their work would be literally brought to a standstill. The argument presented was persuasive and, therefore, the R&D department maintained the mentioned privilege. Less than two months following the implementation of the system, complaints regarding adware and spam email which contained malicious attachments, remained high, to the extent that it seemed as if the defense in depth system installed was ineffectual. Indeed, the department remained as engaged as ever in the removal of adware and in dealing with malicious spam. Needless to say, the cost of wasted time and effort was substantial since, as the employees whom I discussed this event with recalled, attempting to access the internet was futile. Pop-ups and constant redirections from addresses initially requested simply meant that getting any work done was a monumental task in itself. The ICT department, as the head informed me, determined to trace the source as the possibility of the installed system being ineffectual simply defied logic. As the

Stress, Anxiety and Depression among College Students

Stress, Anxiety and Depression among College Students Stress, Anxiety and Depression among College Students Abstract Stress, depression and anxiety are major and commonly reported issue among the college students. Mostly stress and depression among college youths are cause of their educational and academics performance. Usually stress, depression and anxiety are associated with decrease in grades which effects one way or another to student’s skills and ability to perform. Most common reasons for stress, depressions and other psychological problems are time stress, failure, tough competition, academic pressure, some other problems include emotional breakdowns due to inferior feeling for other for some life is not worthy. Many students face psychological problems in a college they must be guided and counselled properly to cope up with their emotional problems and some measures must be taken like forming student counselling centres or mentors and mentee programme must be made compulsory on all colleges. Also a health committee should be formed and professionals must be hired and college must co nduct activities for student and teachers too for their psychological conditions. 1. Introduction Today, I will talk about the stress, depression, anxiety and other psychological problems among the college students all around the world. I will discuss about the problems, its symptoms, and finally the methods to prevent these psychological problems from happening. The college students are the future of our society, they represents the society investment for future thus their mental health is an important factor not only for them their own right but also for society as they are the one who are contributing for larger part of society. The psychological problems like stress, depression and anxiety among college students are increasing every year. There are many reasons for such psychological problem most common problems for these kinds of emotional disorders are greater academic demands, changes in social and family life, new and different environment. Other problems for depression and stress are time pressure, tough competitions, and pressure of academics and fear of failure. 1.1 Background: What are psychological problems? According to health websites and health professional psychological problems like stress, depression and anxiety are disorder in mood that makes us sad and hopeless for periods of time. These kind of psychological problems have significant effect on once life, work, health, his/her enjoyment and people he care about. These kind of physiological problems have impact for short time and long time, for short time psychological problems like stress and depression people feel low for some time but he is able to work and take care of daily activities. But risks are associated with long time psychological problems which sometimes turn into physical illness. There are survey which says millions of people are affected by depression, stress and anxiety every year. The main cause of these psychological problems among college students are stressful life, drugs or illness, family crisis, financial problems, for some it is due to change from their high school life, for others it may be separation from family and academic failure is also one of major cause of stress, depression and other anxiety problems. 2. Why So Stress? â€Å"Our anxiety does not empty tomorrow of its sorrows, but only empties today of its strengths† à ¢Ã¢â€š ¬Ã¢â‚¬ ¢ Charles H. Spurgeon Student forms the base of any society’s future, their wellbeing is quite crucial not only to themselves, but also to the society. Psychological problems in the college students are becoming quite big and needs to be taken care off. These problems varies between 2% to 5% of total student’s populace. (Young, 1978) There are various reason why stress occurs among the students. First and foremost is the fear of academic excellence, often student fear of getting lower marks than expected. This is quite widespread, as practically marks will always be lower than what is expected. Other stresses might be due to changing environment from high school to college, being away from home. It has been observed that the stress, anxiety and depression among the students in second year is way more than that was in the first year, this is primarily due to the increase in the load and complexities of the subjects to be learned. (Eisenberg D, 2007) This further gives an implication that proceeding to the further years will exert more pressure on the student and so the stress will be more. 2.1 Causes of Stress, Anxiety and Depression in Students: Fear of academic excellence. Living away from the family. Feeling of isolation and loneliness. Conflicting Relationship. Increasing complexities in the academics. Financial condition. 2.2 Symptoms of Stress, Anxiety and Depression: Stress and anxiety often leads to depression, it is important to identify whether a student is having depression or not. It is recommended to consult a doctor. Doctor will ask following question to determine whether you are stressing over something. (Farnsworth, 1970) Any history of depression cases. Depression cases in family Medication history. Whether using drugs or alcohol. Negative thoughts of suicide and death. 2.3 Treating Stress, Anxiety and Depression: Often institutions provide medication to the students to overcome depression. The mediation for such stress and depression includes only two effective treatments, antidepressants and psychotherapy. However there might also be the case where a combination of both the two treatment methods can be found. (McArthur, 1961) 2.3.1 Antidepressants: Antidepressants in medical terms works on neurotransmitters. They are some specific compounds alter the way brain works and regulate mood. However it must be used with caution, as exact ways are quite uncertain, how it would work. 2.3.2 Psychotherapy: Psychotherapy is the most recommended way of treating stress and depression. It involves changing the psychology or the thought process of the individual to permanently remove the negative thoughts. There are two ways by which this can be done, which are cognitive behaviour therapy (CBT) and interpersonal therapy (IPT). CBT helps an individual to change the thought process. It includes several sessions to change the way the individual thinks, which consequently moves him out of the depression. While, IPT is used for more serious cases, includes conflicting relationships and other serious personal problems. 2.4 Preventive Measures to be taken by Educational Institutions: Workshops and seminars should be conducted, to identify the students having psychological problems of stress and depression. Institutions should mandatorily have counselling centres to keep a track of thought process of the students. A survey or poll to be conducted to get a scalable insight of the psychological problems among the students. Once the students with such psychological problems are found, respective ways of psychotherapy should be implemented on them. (Mowbray CT, 2006) 2.5 Summary: Stress, anxiety and depression is quite widespread in the student’s community. This is due to various facts such as academic pressure, personal relationships, environmental changes etc. It was found that the quantity of students suffering from the psychological disorders was varying between 2% to 50%. There are some measure that can be taken by the institutional organisation, as discussed in the section 2.4. The most recommended way to treatment of psychological disorders such as stress, anxiety and depression is Psychotherapy. However in more serious cases there could be a combination of psychotherapy and antidepressants. Conclusion Problems like stress, depression and anxiety are serious issue not only for college students but also for us and we should always protect ourselves from getting such a serious and stressful disease. One must be ready to ask for support of his/her family or friends for help. These are dangerous disease thus one must be ready to take support and mentoring as early and appropriately. College must create more affective and war environment for its student to better cope up with the system and adapt it rather than getting depressed and emotionally breaking and getting psychological problems. For psychological well-being of college students health education programs and mentoring should be added to its curriculum and closer attention should also be paid on the teaching methods of institution, teachers and their teaching process. References Eisenberg D, G. S. (2007). Prevalence and correlates of depression, anxiety, and suicidality among university students. American Journal of Orthopsychiatry, 534-542.Studied to know the fact and figures of anxiety, strees and depression in students Farnsworth, D. (1970). Mental health and social change. Ann. Int. Med., 467-472.Studied to analyse effect of social environment change on student McArthur, G. B. (1961). Problems Connected with Studying Cf: Emotional. Appleton-Century Crafts.Studied to analyse students thought process Mowbray CT, M. D. (2006). Campus mental health services: recommendations for change. American Journal of Orthopsychiatry, 226-237.Studied to analyse what institutions can do Young, A. B. (1978). College blues. Psychology Today, 80-82.Studied to analyse college environement in various years

English Composition Essay

In the aspect of writing English composition, several rules and guidelines must be followed for the aspect of clarity, clearness, and understandability. This grammar rules are established to follow a clear and concise presentation of the ideas and concepts being communicated in each composition. Included in these guidelines and rules is the use of examples and how they are used to promote the main argument in each composition. In the use of examples in the English composition, several approaches are established to guide the use of this strategy for the clearness in the composition. First, is using example in a word or phrase employing short approaches towards the presentation. The second is through sentence-length examples, which are more specific as they employ the idea along with the specific example explaining the said concept. Third is through the use of extended examples, which are commonly to be an entire paragraph for more detailed explanation and presentation. For better composition, most writer use different styles and conjoined different approaches in a single essay for more detailed explanation of the main topic. For example, in the composition of John Head entitled â€Å"The Brutal Business of Boxing†, the author was able to clearly and specifically presents his topic and ideas through the use of both single word or phrase example and sentence-length examples. In most paragraphs, the author mentioned specific words to support his topic and in the others, he used the sentence-length examples, which includes the idea and the specific argument explaining the concept. Through this approach, the author has able to present clearly his main argument and reasons about his opinions towards the brutal nature of boxing explaining why the said act should be condone not as a sport but as an uncivilized fight in the society.

what is family - 1210 Words

What is Family? Family has so many different meanings to every individual who has answers this question. Trying to find a general definition for this term is impossible. Everyone has a different concept of what a family is, what I would consider my family is far more stretch than a typical American family. Coming from a Latin culture my family’s considered grandparents, parents, aunts, uncles, friends and down to the last pet. I experienced culture shock when I entered middle school to see what some of my when they referred to family they meant just their parents. For me this new concept of what my friends thought were their family was mom, dad, siblings, and†¦show more content†¦Later they adopted a child placed on adoption in Vietnam. Karen’s idea of a family changed do to her problems of infertility, she come to the understanding that her children didn’t have to be related to her in order to love them as her children. Alfredo Palacios was originally from Puebla, central Mexico. When he was six years old he’s mother passed away leaving he and his younger sister orphans. They were cared for by relatives and soon an older sister who was living in the United States with her husband and children, took them in. Soon after they started a new Life in Santa Ana, Alfredo’s sister and husband separated ending their marriage. She was soon alone carrying the burdens of supporting her children as well as for her sibling. When Alfredo entered high school it was a dream he could play soccer on the school team while this required him to maintain good grades, but the second year he started working part time to help his sister move out of the projects and his sister wanted him to keep working rather than perusing his dreams he and his sister realized he had to move out. He was taken in by a friend’s family that wanted to help him and make a difference in his life. Also there was an instructor that was interested in helping Alfredo recover academically. 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In the article† Absent Fathers: Why Don’t We Ever Talk about the Unmarried Man?† Rebecca Blank states, â€Å"For every single mother, there is a father who is not living with his children. It seems that people haveRead MoreWhat Is A Family? Essay955 Words   |  4 PagesThe word â€Å"family† is unique, special, and controversial among different cultures and ethnicities. As defined by Random House Western Dictionary, a family is â€Å"any group of persons closely related by blood, as parents, children, uncles, aunts, and cousins† (Dictionary.com). Although the definition from Random House follows the infamous proverb of, â€Å"blood is thicker than water,† my definition of family does not. Family is not defined or restricted by blood relations. In my mind, a family is simplyRead MoreWhat Is Extended Family815 Words   |  4 PagesFamily a group consisting of one or two parents and their children: extended family noun 1. 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Community Policing and its Elements and Effects Free Essay Example, 1500 words

Yet, there is evidence to show that community-oriented policing and problem-solving tactics are ineffective at addressing specific crimes. A review of drug law enforcement interventions was problematic in terms of measuring successful outcomes in preventative and reactive policing strategies as often a reduction in arrests is symptomatic of a reduction in crime. However arrests and call-out figures are reactive responses yet part of the intervention outcome measurements. Subsequently, identifying and establishing outcomes for proactive measures can often be challenging. If these measures are adopted, the review provided evidence through meta-analysis that pro-active policing was not strongly supported although it was accepted that this material was more indicative than definitive . As a stand-alone policy, a shift to focusing solely on community-oriented policing and problem-solving is not feasible as there will always be a call for reactive policing in response to crime, particu larly serious, organized, professional or opportunistic crime. There is a role for both forms of policing within communities. Reactive policing and community-oriented policing should be employed in partnership to address issues relating to crime. The US Department of Justice recognizes the need for both by maintaining existing reactive policing policies and strategies whilst also introducing the Office of Community Oriented Policing Services (COPS)which through information and grants, promotes community-based policing and problem-solving. Their mandate is as follows: Community policing is a philosophy that promotes organizational strategies which support the systematic use of partnerships and problem-solving techniques, to proactively address the immediate conditions that give rise to public safety issues such as crime, social disorder, and fear of crime. Rather than simply responding to crimes once they have been committed, community policing concentrates on preventing crime and eliminating the atmosphere of fear it creates. We will write a custom essay sample on Community Policing and its Elements and Effects or any topic specifically for you Only $17.96 $11.86/pageorder now