I saw this explanation form Microsoft Development Network for the said error but it meant Greek to me..."The
mixerGetLineInfo function retrieves information about a specific line of a mixer device.
Also.."Pointer to a
MIXERLINE structure. This structure is filled with information about the audio line for the mixer device. The
cbStruct member must always be initialized to be the size, in bytes, of the
MIXERLINE structure
Theres a whole lot more: link...
http://msdn2.microsoft.com/en-us/library/ms712120.aspx
Hope this helps...anyone ???