private unsafe void GetDateTimePickerButtonRectangle(Message *ptrMessage, int messageNumber)
{
//must be first message
if (messageNumber != 1)
{
throw new Exception("GetDateTimePickerButtonRectangle must be first message");
}
// p1 = handle
IntPtr handle = GetParameterIntPtr(ptrMessage, 0);
CleanUpMessage(ptrMessage);
NM.DATETIMEPICKERINFO dtpi = NM.GetDateTimePickerInfo(handle);
AddReturnValue(new Parameter(this, dtpi.rcButton.top));
AddReturnValue(new Parameter(this, dtpi.rcButton.left));
AddReturnValue(new Parameter(this, dtpi.rcButton.bottom));
AddReturnValue(new Parameter(this, dtpi.rcButton.right));
}