Thanks you for your kind response. 
I've searched around and found it wasn't very complicated to do in HotKeyNet.
So here it is if it can help someone else 
Code:
//-----------
// PRESS CTRL R TO RENAME WOW'S IF YOU LAUNCH THEM MANUALLY
//---------------
<Hotkey ScrollLockOn Ctrl U>
<SendPC local>
<RenameWin "Diablo 3" Diablo1>
<RenameWin "Diablo 3" Diablo2>
//----------------
// DEFINE MAIL LABELS FOR SENDING KEY STROKES
//-----------------
<Label w2 Local SendWinM Diablo2>
//----------------
// Hotkey for moving around holding mouse Lbutton
//-----------------
<Hotkey ScrollLockOn LButton>
<PassThrough>
<SendLabel w2>
<ClickMouse Down LButton NoRestore>
<HotkeyUp ScrollLockOn LButton>
<PassThrough>
<SendLabel w2>
<ClickMouse up LButton NoRestore>
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