/* Set the SW Synth volume on Windows XP, by using the
* Win32 API function mixerSetControlDetails().
*/
public static void SetVolumeWindowsXP(int value)
{
/* The actual master volume range is 0 to 65536. Scale the value */
value = (int)(value * 65536 / 100.0);
int mixerHandle;
int ret = mixerOpen(out mixerHandle, 0, 0, 0, 0);
MIXERCONTROLDETAILS details = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED volumeDetails = new MIXERCONTROLDETAILS_UNSIGNED();
details.item = 0;
/* The ControlID is which volume to modify:
* Master = 0
* Wave = 2
* SW Synth = 4
* CD Player = 6
*/
details.dwControlID = 4;
details.cbStruct = Marshal.SizeOf(details);
details.cbDetails = Marshal.SizeOf(volumeDetails);
details.cChannels = 1;
volumeDetails.dwValue = value;
details.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(volumeDetails, details.paDetails, false);
ret = mixerSetControlDetails(mixerHandle, ref details, MIXER_SETCONTROLDETAILSF_VALUE);
mixerClose(mixerHandle);
}
private static extern int mixerSetControlDetails(int handle, ref MIXERCONTROLDETAILS details, int fdwDetails);
mixerSetControlDetails(int handle, ref MIXERCONTROLDETAILS details, int fdwDetails);
/* Set the SW Synth volume on Windows XP, by using the
* Win32 API function mixerSetControlDetails().
*/
public static void SetVolumeWindowsXP(int value)
{
/* The actual master volume range is 0 to 65536. Scale the value */
value = (int)(value * 65536 / 100.0);
int mixerHandle;
int ret = mixerOpen(out mixerHandle, 0, 0, 0, 0);
MIXERCONTROLDETAILS details = new MIXERCONTROLDETAILS();
MIXERCONTROLDETAILS_UNSIGNED volumeDetails = new MIXERCONTROLDETAILS_UNSIGNED();
details.item = 0;
/* The ControlID is which volume to modify:
* Master = 0
* Wave = 2
* SW Synth = 4
* CD Player = 6
*/
details.dwControlID = 4;
details.cbStruct = Marshal.SizeOf(details);
details.cbDetails = Marshal.SizeOf(volumeDetails);
details.cChannels = 1;
volumeDetails.dwValue = value;
details.paDetails = Marshal.AllocCoTaskMem(Marshal.SizeOf(typeof(MIXERCONTROLDETAILS_UNSIGNED)));
Marshal.StructureToPtr(volumeDetails, details.paDetails, false);
ret = mixerSetControlDetails(mixerHandle, ref details, MIXER_SETCONTROLDETAILSF_VALUE);
mixerClose(mixerHandle);
}
