/// <summary>
/// Allows a windows form to be used as the UI for an anchor window
/// </summary>
public static void AttachWindowsForm(
IVisio.Window anchor_window,
System.Windows.Forms.Form the_form)
{
if (anchor_window == null)
{
throw new System.ArgumentNullException(nameof(anchor_window));
}
if (the_form == null)
{
throw new System.ArgumentNullException(nameof(the_form));
}
// Show the form as a modeless dialog.
the_form.Show();
// Get the window handle of the form.
int hwnd = the_form.Handle.ToInt32();
var hwnd_as_intptr = new System.IntPtr(hwnd);
// Set the window properties to make it a visible child window.
const int window_prop_index = Internal.Interop.NativeMethods.GWL_STYLE;
const int window_prop_value = Internal.Interop.NativeMethods.WS_CHILD | Internal.Interop.NativeMethods.WS_VISIBLE;
Internal.Interop.NativeMethods.SetWindowLong(hwnd_as_intptr, window_prop_index, window_prop_value);
// Set the anchor bar window as the parent of the form.
Internal.Interop.NativeMethods.SetParent(hwnd, anchor_window.WindowHandle32);
// Force a resize of the anchor bar so it will refresh.
int left, top, width, height;
anchor_window.GetWindowRect(out left, out top, out width, out height);
anchor_window.SetWindowRect(left, top, width - 1, height - 1);
anchor_window.SetWindowRect(left, top, width, height);
// Set the dock property of the form to fill, so that the form
// automatically resizes to the size of the anchor bar.
the_form.Dock = System.Windows.Forms.DockStyle.Fill;
// had to set to false to prevent a resizing problem (it was originally set to true)
the_form.AutoSize = true;
}