Return Code	Significance
0	action was registered
1	action was not registered

After a bitmap area (a field title defined as graphics) has been clicked on, the function passed is called with the following parameters:

• DtvLong idf: Id of the field for the field title
• DtvLong row: row position in shares of thousand units
• DtvLong col: column position in shares of thousand units

If the function is called several times with different function pointers, the functions passed this way form a stack that is executed at the trigger moment. If one of the functions in the stack delivers a return code which is not zero, the next trigger function of the stack is jumped to (no mouse action on bitmap registered). If the return code = 0, the execution of the function is stopped.