internal static extern bool GetOpenFileName(ref OpenFileName ofn);
internal static extern bool GetSaveFileName(ref OpenFileName lpofn);
/// <summary>
/// Initializes the dialog.
/// </summary>
private void InitializeDialog()
{
openFileName = new OpenFileName();
this.charBuffer = NativeMethods.CharBuffer.CreateBuffer(0x2000);
openFileName.lStructSize = Marshal.SizeOf(openFileName);
openFileName.lpstrFilter = Filter.Replace('|', '\0') + '\0';
openFileName.lpstrFile = this.charBuffer.AllocCoTaskMem();
openFileName.nMaxFile = 0x2000;
if (_fileNames != null && _fileNames.Length > 0 && !string.IsNullOrEmpty(_fileNames[0]))
{
openFileName.lpstrFileTitle = System.IO.Path.GetFileName(_fileNames[0]) + new string ( '\0', 512 );
}
else
{
openFileName.lpstrFileTitle = new string ( '\0', 512 );
}
openFileName.nMaxFileTitle = openFileName.lpstrFileTitle.Length;
if (this.DialogType == VersionFileDialogType.OpenFileDialog && string.IsNullOrEmpty(this._title))
{
openFileName.lpstrTitle = "Open File";
}
else if (this.DialogType == VersionFileDialogType.SaveFileDialog && string.IsNullOrEmpty(this._title))
{
openFileName.lpstrTitle = "Save File As...";
}
else
{
openFileName.lpstrTitle = this._title;
}
if (this.DialogType == VersionFileDialogType.OpenFileDialog && string.IsNullOrEmpty(this.OkButtonText))
{
this.OkButtonText = "&Open";
}
else if (this.DialogType == VersionFileDialogType.SaveFileDialog && string.IsNullOrEmpty(this.OkButtonText))
{
this.OkButtonText = "&Save";
}
if (string.IsNullOrEmpty(this.CancelButtonText))
{
this.CancelButtonText = "&Cancel";
}
openFileName.lpstrDefExt = _defaultExt;
//position the dialog above the active window
openFileName.hwndOwner = _ownerWindow != null ? _ownerWindow.Handle : IntPtr.Zero;
//we need to find out the active screen so the dialog box is
//centred on the correct display
_activeScreen = Screen.FromControl(Form.ActiveForm);
SetDialogFlags();
//this is where the hook is set. Note that we can use a C# delegate in place of a C function pointer
openFileName.lpfnHook = new WndHookProc(HookProc);
//if we're running on Windows 98/ME then the struct is smaller
if (System.Environment.OSVersion.Platform != PlatformID.Win32NT)
{
openFileName.lStructSize -= 12;
}
}