Which is the parameter of the WinMain():
a.HInstance
b.hPrecInstance
c.Int nCmdShow
d.All of these
Answers
Answer:
d.All of these
Explanation:
A take care of to the preceding example of the utility. This parameter is usually NULL. If you want to locate whether or not some other example already exists, create a uniquely named mutex the usage of the CreateMutex feature. CreateMutex will be triumphant even though the mutex already exists, however the feature will go back ERROR_ALREADY_EXISTS. This shows that some other example of your utility exists, as it created the mutex first. However, a malicious consumer can create this mutex earlier than you do and save you your utility from starting. To save you this situation, create a randomly named mutex and shop the call in order that it could most effective be acquired with the aid of using a certified consumer. Alternatively, you may use a record for this purpose. To restrict your utility to 1 example in line with consumer, create a locked record withinside the consumer's profile directory.
[in] lpCmdLine
Type: LPSTR.
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Answer:
The correct option for the parameters for WinMain( ) is found to be (d) All of these.
Explanation:
All Windows programs include an entry point function called WinMain or wWinMain. This is the signature of wWinMain.
int WINAPI wWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PWSTR pCmdLine, int nCmdShow ) ;
The four parameters are:
- hInstance is what is called a "handle to an instance" or a "handle to a module". The operating system uses this value to identify when loading an executable (EXE) file into memory. Instance handles are required for certain Windows functions, such as loading icons and bitmaps.
- hPrevInstance has no meaning. Used on 16-bit Windows, it is now always null.
- pCmdLine contains command line arguments as a Unicode string.
- nCmdShow is a flag that indicates whether the main application window is minimized, maximized, or displayed normally.
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