Use the clipboardTag(s): Powerscript
Extract data from the clipboard
Put data into the clipboard
String ls_value ls_value = Clipboard()
A special attention is needed when calling Clipboard in a DataWindow control or DataStore object. To retrieve or replace the contents of the system clipboard with text from a DataWindow item (cell value), you must first assign the value to a string and then call the system Clipboard function as follows:
That's because the DataWindow has is own Clipboard function and it is only applicable to graphs.
string ls_data = dw_1.object.column_name[row_number] ::Clipboard(ls_data)
To store bitmap into the clipboard, you need to use some Windows API. See this article