プログラミングしょしんしゃこうざ

きょうはHello, Worldをひょうじしてみましょう

#include<windows.h>

LRESULT CALLBACK WndProc(HWND hwnd , UINT msg , WPARAM wp , LPARAM lp) {
	HDC hdc;
	PAINTSTRUCT ps;
	LPTSTR lptStr = TEXT("Hello, World!");

	switch(msg) {
	case WM_DESTROY:
		PostQuitMessage(0);
		return 0;
	case WM_PAINT:
		hdc = BeginPaint(hwnd , &ps);
		TextOut(hdc , 10 , 10 , lptStr , lstrlen(lptStr));
		EndPaint(hwnd , &ps);
		return 0;
	}
	return DefWindowProc(hwnd , msg , wp , lp);
}

int WINAPI WinMain(HINSTANCE hInstance , HINSTANCE hPrevInstance ,
		 PSTR pCmdLine , int nCmdShow ) {
	HWND hwnd;
	WNDCLASS winc;
	MSG msg;

	winc.style		= CS_HREDRAW | CS_VREDRAW;
	winc.lpfnWndProc	= WndProc;
	winc.cbClsExtra	= winc.cbWndExtra	= 0;
	winc.hInstance		= hInstance;
	winc.hIcon		= LoadIcon(NULL , IDI_APPLICATION);
	winc.hCursor		= LoadCursor(NULL , IDC_ARROW);
	winc.hbrBackground	= (HBRUSH)GetStockObject(WHITE_BRUSH);
	winc.lpszMenuName	= NULL;
	winc.lpszClassName	= TEXT("KITTY");

	if (!RegisterClass(&winc)) return 0;

	hwnd = CreateWindow(
			TEXT("HELLOWORLD") , TEXT("Hello, World!") ,
			WS_OVERLAPPEDWINDOW  | WS_VISIBLE ,
			CW_USEDEFAULT , CW_USEDEFAULT ,
			CW_USEDEFAULT , CW_USEDEFAULT ,
			NULL , NULL ,
			hInstance , NULL
	);

	if (hwnd == NULL) return 0;

	while (GetMessage(&msg , NULL , 0 , 0)) DispatchMessage(&msg);
	return msg.wParam;
}