mirrdraw.c

#include <windows.h>
//
//	メインウィンドウプロシージャ
//
LRESULT CALLBACK mainWndProc(HWND hwnd, UINT msg, WPARAM wp, LPARAM lp){
	HDC hdc;
	char c[512];
	switch(msg){
		case WM_MOUSEMOVE:
			hdc = GetDC(hwnd);
			wsprintf(c, "%s", "★");
			SelectObject(hdc, GetStockObject(DEFAULT_GUI_FONT));
			SetTextColor(hdc, RGB(rand(), rand(), rand()));
			TextOut(hdc, LOWORD(lp), HIWORD(lp), c, lstrlen(c));
			TextOut(hdc, HIWORD(lp), LOWORD(lp), c, lstrlen(c));
			ReleaseDC(hwnd, hdc);
			return 0;
		case WM_RBUTTONUP:
			InvalidateRect(hwnd, NULL, TRUE);
			return 0;
		case WM_DESTROY:
			PostQuitMessage(0);
			break;
	}
	return DefWindowProc(hwnd, msg, wp, lp);
}

//
//	プログラムスタート
//
int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow){
	MSG msg;
	WNDCLASS wc;
	HWND hwnd;

	//メインウィンドウのクラス登録
	wc.style = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc = mainWndProc;
	wc.cbClsExtra = 0;
	wc.cbWndExtra = sizeof(DWORD);
	wc.hInstance = hInstance;
	wc.hIcon = NULL;
	wc.hCursor = LoadCursor(NULL, IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetSysColorBrush(COLOR_WINDOW);
	wc.lpszMenuName = NULL;
	wc.lpszClassName = TEXT("MainWindowClass");
	if(! RegisterClass(&wc) ) return 0;

	//メインウィンドウを作成
	hwnd = CreateWindow(
		TEXT("MainWindowClass"), TEXT(""),
		WS_SYSMENU | WS_MINIMIZEBOX | WS_MAXIMIZEBOX | WS_VISIBLE,
		0, 0,
		800, 1000,
		NULL, NULL,
		hInstance, NULL
	);
	if(hwnd == NULL ) return 0;

	//メインループ
	while(GetMessage(&msg, NULL, 0, 0)){
		TranslateMessage(&msg);// Altキーでのメニューポップアップ有効
		DispatchMessage(&msg);
	}
	return msg.wParam;
}