phoneSetVolume (Windows Embedded CE 6.0)

1/6/2010

This function sets the volume of the speaker component of the specified hookswitch device to the specified level.

Syntax

LONG WINAPI phoneSetVolume(
  HPHONE hPhone,
  DWORD dwHookSwitchDev,
  DWORD dwVolume 
);

Parameters

• hPhone
  Handle to the open phone device. The application must be the owner of the phone.

• dwHookSwitchDev
  Hookswitch device whose speaker's volume is to be set, one of the PHONEHOOKSWITCHDEV constants.

• dwVolume
  New volume setting of the device. The dwVolume parameter specifies the volume level of the hookswitch device. This is a number in the range 0x00000000 (silence) to 0x0000FFFF (maximum volume). The actual granularity and quantization of volume settings in this range are service provider-specific. A value for dwVolume that is out of range is set to the nearest value in the range.

Return Value

Returns a positive request identifier if the function is completed asynchronously or a negative error number if an error occurs. The dwParam2 parameter of the corresponding PHONE_REPLY message is zero if the function succeeds or it is a negative error number if an error occurs. The following table shows the return values for this function.

Requirements

See Also

Concepts

TAPI Phone Device Functions