I found a way by pinning a window on front (always on top) then launch wamp then unpin window previously pinned at front. With 2 softwares : autohotkey and a program to pin window at front
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SendInput, shortcut_to_pin_window_on_top
Run, "C:\wamp64\wampmanager.exe"
Sleep 20000
SendInput, shortcut_to_unpin_window_on_top
Exit
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WampServer English