// Hook function
static void WinEventProc(IntPtr hWinEventHook, uint eventType,
IntPtr hwnd, int idObject, int idChild, uint dwEventThread, uint dwmsEventTime)
{
CustomSaveFileDialog csfdg = customSaveFileDialog;
if (csfdg.hDlg == IntPtr.Zero)
{
csfdg.hDlg = FindWindowEx(IntPtr.Zero, IntPtr.Zero, "#32770", "Save As");
}
if (hwnd == csfdg.hDlg)
{
IntPtr hParent = GetParent(csfdg.hCtrl);
//this is done only once
if (!(hParent == csfdg.hDlg))
{
SetParent(csfdg.hCtrl, csfdg.hDlg); //Bind the user control to the Common Dialog
}
RECT cliRect;
GetClientRect(csfdg.hDlg, out cliRect);
//Position the button in the file dialog
MoveWindow(csfdg.hCtrl, cliRect.Left + 130, cliRect.Bottom - 55, 500, 60, true);
}
}
/// <summary>
/// Constructor
/// </summary>
/// <param name="ctrl">The User Control to be displayed in the file dialog</param>
public CustomSaveFileDialog(UserControl ctrl)
{
InitializeComponent();
customSaveFileDialog = this;
this.ctrl = ctrl;
hCtrl = ctrl.Handle;
//Setup Hook; for simplicity, hook all possible events from the current process
hHook = SetWinEventHook(1, 0x7fffffff, IntPtr.Zero,
procDelegate, (uint)System.Diagnostics.Process.GetCurrentProcess().Id, 0, WINEVENT_OUTOFCONTEXT);
}