The WinMain function is called by the system as the initial entry point for a Windows-based application.
Syntax
int WinMain(
HINSTANCE hInstance,
HINSTANCE hPrevInstance,
LPSTR lpCmdLine,
int nCmdShow
);
Parameters
hInstance
[in] Handle to the current instance of the application.
hPrevInstance
[in] Handle to the previous instance of the application. This parameter is always NULL. If you need to detect whether another instance already exists, create a uniquely named mutex using the CreateMutex function. CreateMutex will succeed even if the mutex already exists, but the function will return ERROR_ALREADY_EXISTS. This indicates that another instance of your application exists, because it created the mutex first.
lpCmdLine
[in] Pointer to a null-terminated string specifying the command line for the application, excluding the program name. To retrieve the entire command line, use the GetCommandLine function.
nCmdShow
[in] Specifies how the window is to be shown. This parameter can be one of the following values.
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