#include<windows.h>

// winmm.lib をリンクする
#pragma comment(lib,"winmm")

LRESULT CALLBACK WindowProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
	static MCI_OPEN_PARMS mop;
	static MCI_PLAY_PARMS mpp;

	switch(uMsg){
		case WM_CREATE:
			//オープン
			mop.lpstrDeviceType="WaveAudio";
			mop.lpstrElementName="Windows XP Startup.wav";
			mop.dwCallback=(DWORD)hWnd;
			mciSendCommand(NULL,MCI_OPEN,
				MCI_OPEN_TYPE | MCI_OPEN_ELEMENT | MCI_NOTIFY,(DWORD)&mop);
			//MCI_PLAY_PARMS構造体の設定
			mpp.dwCallback=(DWORD)hWnd;
			return 0;
		case WM_DESTROY:	//クローズ
			mciSendCommand(mop.wDeviceID,MCI_CLOSE,0,0);
			PostQuitMessage(0);
			return 0;
		case MM_MCINOTIFY:	//再生(正常終了した時だけ)
			if(wParam!=MCI_NOTIFY_SUCCESSFUL){
				MessageBox(hWnd,"異常終了しました",NULL,MB_OK);
				return 0;
			}
			mciSendCommand((MCIDEVICEID)lParam,MCI_SEEK,MCI_SEEK_TO_START,0);
			mciSendCommand((MCIDEVICEID)lParam,MCI_PLAY,MCI_NOTIFY,(DWORD)&mpp);
			return 0;
		case WM_LBUTTONDOWN:	//停止
			mciSendCommand(mop.wDeviceID,MCI_STOP,0,0);
			mciSendCommand(mop.wDeviceID,MCI_SEEK,MCI_SEEK_TO_START,0);
			return 0;
		case WM_RBUTTONDOWN:	//再生
			mciSendCommand(mop.wDeviceID,MCI_PLAY,MCI_NOTIFY,(DWORD)&mpp);
			return 0;
	}
	return DefWindowProc(hWnd,uMsg,wParam,lParam);
}

int WINAPI WinMain(
	HINSTANCE hInstance,HINSTANCE hPrevInstance,PSTR lpCmdLine,int nCmdShow)
{
	WNDCLASS wc;
	MSG msg;

	wc.style		 = CS_HREDRAW | CS_VREDRAW;
	wc.lpfnWndProc	 = WindowProc;
	wc.cbClsExtra	 = 0;
	wc.cbWndExtra	 = 0;
	wc.hInstance	 = hInstance;
	wc.hIcon		 = LoadIcon(NULL,IDI_APPLICATION);
	wc.hCursor		 = LoadCursor(NULL,IDC_ARROW);
	wc.hbrBackground = (HBRUSH)GetStockObject(WHITE_BRUSH);
	wc.lpszMenuName	 = NULL;
	wc.lpszClassName = __FILE__;
	if(!RegisterClass(&wc)) return 0;

	HWND hWnd=CreateWindow(
		__FILE__,"MCIコマンドによる無限ループ再生",
		WS_OVERLAPPEDWINDOW | WS_VISIBLE,
		CW_USEDEFAULT,CW_USEDEFAULT,
		CW_USEDEFAULT,CW_USEDEFAULT, 
		NULL,NULL,hInstance,NULL);
	if(hWnd==NULL) return 0;

	BOOL bRet;
	while((bRet=GetMessage(&msg,NULL,0,0))!=0){
		if(bRet==-1) break;
		DispatchMessage(&msg);
	}

	return (int)msg.wParam;
}