Zitat von
MSDN:
The low-order word contains the left-channel volume setting, and the high-order word contains the right-channel setting.
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If a device does not support both left and right volume control, the low-order word of dwVolume specifies the volume level, and the high-order word is ignored.
Wie sieht AVolume denn aus, heißt welche Zahl übergibst Du?