DtvLong dal_but_chk_but (idb)

Checks whether the passed button area exists in local memory.

Input Parameters Significance
DtvLong idb button area Id

Output Parameters Significance
none -

Return Code Significance
0 button area exists
1 button area does not exist

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

Attention! Applying a program function to a non-existent object can result in a system crash.