🔒 Locked

Basic question about functions in Windows programmigng.

Started by digitalfreak May 21, 2003 at 8:42 AM 0 replies 300+ views

Original Post

May 21, 2003 at 8:42 AM

I just started learning Windows programming,before I''ve only programmed in pure c/c++,java.In those languages,a function always takes the form of: return_type function_name(args...){body...}; but now in Windows programming,I frequently see functions like: int WINAPI MessageBox (HWND, LPCSTR, LPCSTR, UINT); or even more confusing: WINUSERAPI int WINAPI MessageBoxA (HWND hWnd, LPCSTR lpText, LPCSTR lpCaption, UINT uType); What''re the WINUSERAPI and WINAPI?Doesn''t these violate the function definition(declaration) rules?

Glyph

May 21, 2003 at 8:47 AM

Typically you won''t need to concern yourself with those... they are calling convention indicators. What they do is specify how parameters are passed to a callee function and how a return value is passed back to the caller. If you''ve got browse information turned on, you can right-click on WINAPI and see that it is just a #define for __stdcall or __cdecl or something like that. AFAIK, they aren''t Win32 specific, but I could be making that up

Hope this helps.

-Glyph

Topic Locked

This topic has been locked by a moderator. New replies are not allowed.