#include<windows.h>

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

#define FILENAME "Windows XP Startup.wav"

LRESULT CALLBACK WindowProc(HWND hWnd,UINT uMsg,WPARAM wParam,LPARAM lParam)
{
	HANDLE fh;
	DWORD dwFileSize,dwReadSize;
	static LPCSTR lpSound;

	switch(uMsg){
		case WM_CREATE:
			fh=CreateFile(FILENAME,GENERIC_READ,0,NULL,
				OPEN_EXISTING,FILE_ATTRIBUTE_NORMAL,NULL);
			if(fh==INVALID_HANDLE_VALUE){
				MessageBox(NULL,"ファイルが開けません",FILENAME,MB_OK);
				return -1;	//WM_CREATE が -1 を返すとウィンドウ破棄
			}
			dwFileSize=GetFileSize(fh,NULL);
			lpSound=(LPCSTR)HeapAlloc(GetProcessHeap(),HEAP_ZERO_MEMORY,dwFileSize);
			ReadFile(fh,(LPVOID)lpSound,dwFileSize,&dwReadSize,NULL);
			CloseHandle(fh);
			return 0;
		case WM_DESTROY:
			PlaySound(NULL,NULL,0);
			HeapFree(GetProcessHeap(),0,(LPVOID)lpSound);
			PostQuitMessage(0);
			return 0;
		case WM_LBUTTONDOWN:	//再生
			PlaySound(lpSound,NULL,SND_MEMORY | SND_ASYNC | SND_LOOP);
			return 0;
		case WM_RBUTTONDOWN:	//停止
			PlaySound(NULL,NULL,0);
			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__,"PlaySound関数によるWAVEファイル再生(メモリから)",
		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;
}