Hello Everybody

I have a form with a grid to enter monthly time data for contracts into a cursor.

The cursor has always 31 rows. (= day 1 to 31,1 to 31 marks,1 to 31 starttimes,1 to 31 endtimes ...)
The cursor is filled with default planning data values for the given month and contract.
Now i want to do 2 things:
a:
Disable (or set to read only) some rows under spezial circumstances.
(disable row 30 and 31 if month = februar or disable row 1 to 14 if contract starts on 15s day of month)
The actual month and the contract start date are values of textboxes in my form.(can be part of the cursor if needed)

b:
disable(or set to read only) a row column for spezial circumstances.
If field MARK in column2 contais "XYZ" or "YYY" or ... it can't be changed. If MARK has another value it can be changed.

Any help welcomed
Best regards
Albert