C++写的超简单的MP3音频播放程序

/*---------------------------------------- BTNLOOK.C -- Button Look Program (c) Charles Petzold, 1998 ----------------------------------------*/ #include <windows.h> #include <commdlg.h> void PopFileInitialize (HWND) ; BOOL PopFileOpenDlg (HWND, PTSTR, PTSTR) ; void paly_mp3(char *dress); void pause_mp3(); void reset_mp3(); struct { int iStyle ; TCHAR * szText ; } button[] = { BS_PUSHBUTTON, TEXT ("打开"), BS_PUSHBUTTON, TEXT ("播放"), BS_PUSHBUTTON, TEXT ("暂停"), BS_PUSHBUTTON, TEXT ("重置"), BS_PUSHBUTTON, TEXT ("退出"), } ; #define NUM (sizeof button / sizeof button[0]) TCHAR szAppName[] = TEXT ("BtnLook") ; LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ; int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow) { HWND hwnd ; MSG msg ; WNDCLASS wndclass ; wndclass.style = CS_HREDRAW | CS_VREDRAW ; wndclass.lpfnWndProc = WndProc ; wndclass.cbClsExtra = 0 ; wndclass.cbWndExtra = 0 ; wndclass.hInstance = hInstance ; wndclass.hIcon = LoadIcon (NULL, IDI_APPLICATION) ; wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ; wndclass.hbrBackground = (HBRUSH) GetStockObject (WHITE_BRUSH) ; wndclass.lpszMenuName = NULL ; wndclass.lpszClassName = szAppName ; if (!RegisterClass (&wndclass)) { MessageBox (NULL, TEXT ("This program requires Windows NT!"), szAppName, MB_ICONERROR) ; return 0 ; } hwnd = CreateWindow (szAppName, TEXT ("播放音频程序"), WS_OVERLAPPEDWINDOW, 200, 200, 290, 170, NULL, NULL, hInstance, NULL) ; ShowWindow (hwnd, iCmdShow) ; UpdateWindow (hwnd) ; while (GetMessage (&msg, NULL, 0, 0)) { TranslateMessage (&msg) ; DispatchMessage (&msg) ; } return msg.wParam ; } LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) { static HWND hwndButton[NUM] ; static RECT rect; static HDC hdc ; static TCHAR szBuffer[50]; static TCHAR szTop[] = TEXT("选择的歌曲是："); static TCHAR szFileName[MAX_PATH], szTitleName[MAX_PATH] ; static int cxChar, cyChar ; static PAINTSTRUCT ps ; static int i; switch (message) { case WM_CREATE : cxChar = LOWORD (GetDialogBaseUnits ()) ; cyChar = HIWORD (GetDialogBaseUnits ()) ; for (i = 0 ; i < NUM ; i++) hwndButton[i] = CreateWindow ( TEXT("button"), button[i].szText, WS_CHILD | WS_VISIBLE | button[i].iStyle, cyChar * (1 + 3 * i),cyChar * 5, 5 * cxChar, 7 * cyChar / 4, hwnd, (HMENU)i, ((LPCREATESTRUCT) lParam)->hInstance, NULL) ; PopFileInitialize (hwnd) ; EnableWindow (GetDlgItem(hwnd,1), FALSE); EnableWindow (GetDlgItem(hwnd,2), FALSE); EnableWindow (GetDlgItem(hwnd,3), FALSE); return 0 ; case WM_SIZE : rect.left = 24 * cxChar ; rect.top = 2 * cyChar ; rect.right = LOWORD (lParam) ; rect.bottom = HIWORD (lParam) ; return 0 ; case WM_PAINT : InvalidateRect (hwnd, &rect, TRUE) ; hdc = BeginPaint (hwnd, &ps) ; SetBkMode (hdc, TRANSPARENT) ; TextOut (hdc, 2 * cxChar, cyChar, szTop, lstrlen (szTop)) ; EndPaint (hwnd, &ps) ; return 0 ; case WM_DRAWITEM : return 0 ; case WM_COMMAND : switch (LOWORD (wParam)) { case 0 : if (!PopFileOpenDlg (hwnd, szFileName, szTitleName)) { MessageBox(hwnd, TEXT ("放弃选择文件!"), szTitleName,0) ; szFileName[0] = '\0' ; szTitleName[0] = '\0' ; } else { hdc=GetDC(hwnd); TextOut (hdc, 2 * cxChar, 3 * cyChar, szTitleName, lstrlen (szTitleName)) ; EnableWindow (GetDlgItem(hwnd,0), FALSE); EnableWindow (GetDlgItem(hwnd,1), TRUE); EnableWindow (GetDlgItem(hwnd,2), TRUE); EnableWindow (GetDlgItem(hwnd,3), TRUE); } return 0 ; case 1: paly_mp3(szFileName); return 0; case 2: pause_mp3(); return 0; case 3: reset_mp3(); EnableWindow (GetDlgItem(hwnd,0), TRUE); EnableWindow (GetDlgItem(hwnd,1), FALSE); EnableWindow (GetDlgItem(hwnd,2), FALSE); szFileName[0] = '\0' ; szTitleName[0] = '\0' ; return 0; case 4: exit(0); return 0; } return 0; case WM_DESTROY : exit(0); return 0 ; } return DefWindowProc (hwnd, message, wParam, lParam) ; }