一个调用打开对话框的函数

// *****************************************************************************//
// *****************************************************************************//
char FileName[256]; // temp buffer to hold filename
OPENFILENAME musicFile; // structure for file open dialog

bool GetOpenFile()     // get a file to play
{
    // fill in structure fields for Open File dialog box
    musicFile.lStructSize = sizeof(OPENFILENAME);
    musicFile.hwndOwner = hWnd;
    musicFile.lpstrFilter = "Music Files (*.mp3 *.wav)\0*.mp3;*.wav\0All Files (*.*)\0*.*\0\0";
    musicFile.lpstrCustomFilter = NULL;
    musicFile.nFilterIndex = 1;
    musicFile.lpstrFile = NULL;
    musicFile.lpstrFile = FileName;
    musicFile.nMaxFile = sizeof(FileName);
    musicFile.lpstrFileTitle = NULL;
    musicFile.lpstrInitialDir = NULL;
    musicFile.lpstrTitle = "Select Music To Visualize";
    musicFile.Flags = OFN_HIDEREADONLY | OFN_FILEMUSTEXIST | OFN_PATHMUSTEXIST;
    musicFile.lpstrDefExt = "*.MP3";
    *FileName = '\0';

    // activate the Open File dialog box
    if (!GetOpenFileName(&musicFile))
    {
      return false;
    }
    return true;  // good if it got here
}