Wo kommt denn die Definition von MouseSignal her?
http://msdn.microsoft.com/en-us/libr...8VS.85%29.aspx
Alles DWORD, aber in Delphi würde ich den Delphieigenen Dypen LongWord nehmen.
Zitat:
The high-order word indicates the distance the wheel is rotated, expressed in multiples or divisions of WHEEL_DELTA, which is 120.
Distance := ShortInt(WParam shr 16)