Control form Command Button based on subform

[HRakibul]

hi,
i have some command button and some combo box on my form and also a subform. the subform contains some field. the fields used to enter numeric values.
i need to disable my command button on the form based on the subform fields if they r null.

i have enclose an image for easy understanding. please see the image.

 

[vbaInet]

Double post:

http://www.access-programmers.co.uk/forums/showthread.php?t=268617