To upload a logo ( bmp or jpg file) from the local system to SAP, use transaction code - OAER.
Inside that give class name - pictures
class type - OT
object key - ALVLOGO
click execute/f8. Then inside the screen below, click standard doc.type list and select screen. Right click on it and click import file. Then select a file from ur local system and upload it. The object key which we give here is the value passed to Reuse_alv_commentary_write function.
Ths Reddy B in sdn.