public DialogResult ShowDialog(IWin32Window owner, IFileDialogUICallbacks uiCallbacks)
{
if (uiCallbacks == null)
{
throw new ArgumentNullException("uiCallbacks");
}
this.uiCallbacks = uiCallbacks;
int hrCCD = FileDialog.ClearClientData();
uint dwCookie = 0xdeadbeef;
if (this.fileDialogEvents != null)
{
FileDialog.Advise(this.fileDialogEvents, out dwCookie);
}
OnBeforeShow();
int hr = 0;
UI.InvokeThroughModalTrampoline(
owner,
delegate(IWin32Window modalOwner)
{
hr = this.fileDialog.Show(modalOwner.Handle);
GC.KeepAlive(modalOwner);
});
DialogResult result;
if (hr >= 0)
{
result = DialogResult.OK;
}
else
{
result = DialogResult.Cancel;
}
this.dialogResult = result;
if (this.fileDialogEvents != null)
{
FileDialog.Unadvise(dwCookie);
}
OnAfterShow();
this.uiCallbacks = null;
GC.KeepAlive(owner);
return(result);
}