Build and Debug C app in Windows

readme.md

pre-req:

• install VS
• add VS's "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Tools\MSVC\14.35.32215\bin\Hostx64\x64" to system environment Path var

to build:

• type "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvars32"
• type "cl -Zi test.c user32.lib gdi32.lib"

to debug:

• type "/devenv /debugexe ./test.exe"
• hit F11 key, click continue button

test.c

#include <windows.h>

LRESULT CALLBACK MainWindowCallback(HWND Window, UINT Message, WPARAM WParam, LPARAM LParam) {
	LRESULT Result = 0;
	switch (Message) {
		case WM_CLOSE:
		{
			PostQuitMessage(0);
		} break;
		case WM_PAINT:
		{
			PAINTSTRUCT Paint;
			HDC DeviceContext = BeginPaint(Window, &Paint);
			int X = Paint.rcPaint.left;
			int Y = Paint.rcPaint.top;
			int Width = Paint.rcPaint.right - X;
			int Height = Paint.rcPaint.bottom - Y;
			PatBlt(DeviceContext, X, Y, Width, Height, WHITENESS);
			EndPaint(Window, &Paint);
		} break;
		default: {
			Result = DefWindowProc(Window, Message, WParam, LParam);
		} break;
	}
	return(Result);
}

int CALLBACK WinMain(HINSTANCE Instance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nShowCmd) {

	WNDCLASS WindowClass;
	memset(&WindowClass, '\0', sizeof(WindowClass));
	WindowClass.style = CS_OWNDC | CS_HREDRAW | CS_VREDRAW;
	WindowClass.lpfnWndProc = MainWindowCallback;
	WindowClass.hInstance = Instance;
	WindowClass.lpszClassName = "MainWindowClass";

	if (RegisterClass(&WindowClass)) {
		HWND WindowHandle = CreateWindowEx(0, WindowClass.lpszClassName, "TestWindow", WS_OVERLAPPEDWINDOW | WS_VISIBLE, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, CW_USEDEFAULT, 0, 0, Instance, 0);
		if (WindowHandle) {
			for (;;) {
				MSG Message;
				BOOL MessageResult = GetMessage(&Message, 0, 0, 0);
				if (MessageResult > 0) {
					TranslateMessage(&Message);
					DispatchMessage(&Message);
				}
				else
					break;
			}
		}
	}

	return (0);
};