Hook the drag and drop functionality of windows.....

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Hi, all

i am quite tired in searching for any thing that can help me in hooking the drag and drop functionality of the windows, and yet i am unable to find an exact solution....

what i want to do is to check the file's name before being dropped, anywhere in my system...then allow or disallow the movement of the file according to my requirements...so i have to make a dll to hook the event being generated by the drag and drop opertaion..

there is a lot about setwineventhook() api but i am unable to understand it completely ...whether it is used to hook the event generated while dragging an object???is there any interface to use this api???is this the right way ot hook the drag and drop handler...just like to hook the copy,paste operations there is an ICopyHook interface ..???

plz tell me if i am heading in the right direction aur if not then plz direct me in the right direction....

urgently need a help..thanx in advance..:)

Sameen.