I am trying to return a value for a field and also check if the feild is NULL at the same time with this:
IIf(nz([Forms]![frmInstallSchcedule]![cboInstaller].[Value],"")="",[installer],[Forms]![frmInstallSchcedule]![cboInstaller].[Value])
if the feild 'installer' has no data, then it does...