DtvLong dal_wdg_chk_wdg (iwd)

Checks whether the widget passed exists in local memory.

Input Parameters Significance
DtvLong iwd widget Id

Output Parameters Significance
no -

Return Code Significance
0 widget exists
1 widget does not exist

Use this function to check the existence of a widget whenever you want to apply program functions to the object, but are not sure whether the object really exists in local memory.

Attention! Applying a program function to a nonexistent object can result in a system crash.