This allows linking our d3dx9.dll to Microsoft's d3dcompiler.lib implib.

Resetting it results in position discontinuity. With frequent
SetFrequency() calls, this produces audible crackling. The issue
affects pedestrian voices in GTA: San Andreas.

This lets the compiler check that the format and argument sizes match.

In the current implementation, the main UI will be blocked after
the uninstaller is launched. So using MsgWaitForMultipleObjects()
to wait the process and process new messages from GUI. Also popup
a message dialog while trying to launch multiple uninstallers.