I am using the MS Datetime picker ActiveX control on a form and would like to conditionally change the controlsource property of the control to "" whenever there is an empty/null date field to avoid OLE dispatch error that results when the controls encounters an empty/null date.

I have put the following code in the init method of the form.

if empty(invhdrdate)
thisform.txtcal.controlsource=""
endif

invhdrdate is a date field from a table, txtcal is my datetime picker control.

When this code is run, I am getting "OLE Dispatch Error..Property is readonly".

How can I avoid this ? Is there anyway to code around the empty/null date issue with the datetime picker control ?

I am using VFP 7.0

Thank you.