ALV display using REUSE_ALV_HIERSEQ_LIST_DISPLAY

Hi,

I am using FM REUSE_ALV_HIERSEQ_LIST_DISPLAY for displaying Header & Item data. I need to display a line of text at header level depending on one of the header field value. Let say if my header field,

FIELD1 = X , then i need to display a line text (Value Exists) below header values . If FIELD = Y, then this text line should not be displayed.

Thanks & Reagrds

Rajneesh