Please use the search button '?do=embed' frameborder='0' data-embedContent>> a little bit modified: MsgBox(0,"", IsWebcamPresent()) Func IsWebcamPresent() $StructName = DllStructCreate("char[1024]") $StructDesc = DllStructCreate("char[1024]") For $i = 0 To 9 $aRslt = DllCall("Avicap32.dll", "bool", "capGetDriverDescription", "dword", $i, "ptr", DllStructGetPtr($StructName), "dword", DllStructGetSize($StructName), "ptr", DllStructGetPtr($StructDesc), "dword", DllStructGetSize($S