8.27.8 VarIsNull
VarIsNull returns a Boolean True if the Subject variant contains the special Null value, otherwise it returns a Boolean False.
VarIsNull( Subject )
Example
This statement tests if the value in the grid cell is unknown or missing:
If (VarIsNull( #grid_1.focusCell.value ))
Use Builtin(MESSAGE_BOX_SHOW) With_Args(OK OK Information 'Variant' 'The value is unknown or missing.')
Endif