private void ShowComboBoxInfo(IWin32Window control, bool showEditHandle)
{
NativeMethods.COMBOBOXINFO info;
info = new NativeMethods.COMBOBOXINFO();
info.cbSize = Marshal.SizeOf(info);
if (NativeMethods.GetComboBoxInfo(control.Handle, ref info))
{
IntPtr handle;
handle = showEditHandle ? info.hwndEdit : info.hwndList;
MessageBox.Show(handle == IntPtr.Zero ? "This control does not support this mode." : string.Format("The requested handle is {0}.", handle), this.Text, MessageBoxButtons.OK, MessageBoxIcon.Information);
}
else
{
MessageBox.Show("Failed to obtain requested information.", this.Text, MessageBoxButtons.OK, MessageBoxIcon.Exclamation);
}
}
private void AttachHandle()
{
this.ReleaseHandle();
if (this.IsHandleCreated && this.AllowDoubleClick && this.DropDownStyle == ComboBoxStyle.Simple)
{
NativeMethods.COMBOBOXINFO info;
info = new NativeMethods.COMBOBOXINFO();
info.cbSize = Marshal.SizeOf(info);
if (NativeMethods.GetComboBoxInfo(this.Handle, ref info))
{
IntPtr hWnd;
hWnd = info.hwndList;
_listBoxWindow = new ListBoxNativeWindow(this);
_listBoxWindow.AssignHandle(hWnd);
}
}
}