A File Manager extension sends a FM_GETSELCOUNT message to retrieve a count of the selected files in the active File Manager window (either the directory window or the Search Results window).
FM_GETSELCOUNT
wParam = 0; // not used, must be zero
lParam = 0; // not used, must be zero
Parameters
This message has no parameters.
Return Values
The return value is the number of selected files.
See Also