Thread: simple question on creating a window

hi all~

i'm newbie to windows and GUI programming and just start reading "Windows Programming" but something confused me on createing a window. here are my questions:

1. all samples in the book are written in C, can C++ do windows programing instead ?
2. there are always some attributes like "WINAPI" and "CALLBACK" in function declaration like this:

Code:

LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow);

what's the difference for functions with and without them ?
and i'd appreciate anyone could figure out where relative documentation is in MSDN.
3. for a simple window program, how many functions we must code with ? (i know only WinMain, ShowWindow and UpdateWindow)

tks.

1. Yes.

2. They're #defined macros for __stdcall.

3. For a quick, no-frills window, you'll use about a dozen.

1. Yes. Anything (with possibly a few exceptions, I'm not sure) written in C can be compiled as C++. If you want more OO design (eg, using classes) you might look into MFC or write your own wrappers for the API.

2. Take a look at this page. WINAPI, for example, is defined as __stdcall (at least on my compiler)

3. Read some tutorials

Edit: Guess I'm sloooow

tks guys i've made a cute window now, but met some problems when facing messages. here is my callback function to deal with messages:

Code:

LRESULT CALLBACK WndProc(HWND hwnd, UINT iMsg, WPARAM wParam, LPARAM lParam)
{
	switch (iMsg)
	{
		case WM_PAINT:
			PAINTSTRUCT ps;
			HDC hdc;
			hdc = BeginPaint(hwnd, &ps);
			TextOut(hdc, 100, 100, "Holla !", 10);
			EndPaint(hwnd, &ps);
			break;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
		case WM_CLOSE:
			DestroyWindow(hwnd);
			break;
		default:
			return DefWindowProc(hwnd, iMsg, wParam, lParam);
	}

	return 0;
}

when i compile the program it reports an error like this:
[Linker error] undefined reference to `TextOutA@20'
i'm with Dev-C++, anyone help me ? tks !!!