also in your isdektop you fill data only when it is a desktop window but do nothing if it isnt. the best thing to do would be fill it with $true and $false. this way scripters can use it in direct comparisons for example
if ($dll(blah blah)) //its a desktop window
or
if (!$dll(blah blah)) //its not a desktop window
of course the convention you use is up to you. your current setup however will always return a true value. if its not a desktop window it will return whatever data was (i.e the window handle) so they cant use the ! negate operator. again its up to you it just seems to make more sense and fits easier with mIRC script.
oops meant to edit the previous post sorry
