ScreenCaptor

If $CmdLine[0]>1 then
    Local $filename = StringTrimLeft($CmdLine[1], StringInStr($CmdLine[1], "\", 0, -1)) ; search for the last \ and trim everything on the left of it
    Local $url = $CmdLine[2]

    ClipPut($url & $filename)
    ;ClipPut("https://dl.dropbox.com/u/55553666/screenshots/myFile.png") - that's what finished string looks like
elseif $CmdLine[0] == 1 then
    beep(700,100)
    MsgBox(0, "Not enough arguments", "Your URL (prefix) is missing as 2nd argument!")
else
    beep(700,100)
    MsgBox(0, "No arguments passed", "You must pass a filename (1) and URL (2) as arguments!")
endif