winmain

What is the difference between the three functions and when to use them?? WinMain is used for an application (ending .exe) to indicate the process is starting. It will provide command line arguments for the process and serves as the user code entry point for a process. WinMain (or a different version of main) is also a required function. The OS needs a function to call in order to start a process running. DllMain is used for a DLL to signify a lot of different scenarios. Most notably, it will be called when The DLL is loaded into the process: DLL_PROCESS_ATTACH The DLL is unloaded from the

I am trying to compile and having following problem $ gcc errlib.c -o errlib.o /usr/lib/gcc/x86_64-pc-cygwin/4.8.2/../../../../lib/libcygwin.a(libcmain.o): In function `main': /usr/src/debug/cygwin-1.7.30-1/winsup/cygwin/lib/libcmain.c:39: undefined reference to `WinMain' /usr/src/debug/cygwin-1.7.30-1/winsup/cygwin/lib/libcmain.c:39:(.text.startup+0x7e): relocation truncated to fit: R_X86_64_PC32 against undefined symbol `WinMain' collect2: error: ld returned 1 exit status Any suggestions? These files are well tested and generated the code fine before but now i think there might be some

I've started to learn Win32 API in C. I saw that the main function is something like int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { .. } but I know that a function in C is like [ReturnType] [FunctionName] (Args) { .. } In this case the return type is int and the function name is WinMain. So what does the WINAPI stand for and is it necessary? Thank you . :) It's specifying the calling convention , which is how arguments to functions are placed and managed on the stack. You can mix calling conventions, say if you're calling some external code,

What are the difference from these 2 function?: int APIENTRY _tWinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPTSTR lpCmdLine, int nCmdShow) _tWinMain is just a #define shortcut in tchar.h to the appropriate version of WinMain . If _UNICODE is defined, then _tWinMain expands to wWinMain . Otherwise, _tWinMain is the same as WinMain . The relevant macro looks something like this (there's actually a lot of other code interspersed): #ifdef _UNICODE #define _tWinMain wWinMain #else #define

Could you please explain to me the WINAPI word in the WinMain() function? In the simplest way.. #include <windows.h> int -->WINAPI<-- WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow) { MessageBox(NULL, "Goodbye, cruel world!", "Note", MB_OK); return 0; } Is it just some Windows funky mode? What does it do? Or rather what is this C++ feature I haven't encountered yet? WINAPI is a macro that evaluates to __stdcall , a Microsoft-specific keyword that specifies a calling convention where the callee cleans the stack. The function's caller and callee need to agree