>What would cause this error. OLE IDispatch exeception code 0 from monthview: Invalid property value.

Hi Randy,

This error may be caused by mismatch between values in Month and Day properties of the control. IOW, if you assign new value to the either of the properties and that creates an invalid date, the above error will be generated. See PRB: Error When Setting DateTimePicker Control Programmatically for more details.