The acmFormatChoose function creates an ACM-defined dialog box that enables the user to select a waveform-audio format.
MMRESULT ACMAPI acmFormatChoose( LPACMFORMATCHOOSE pafmtc );
Pointer to an ACMFORMATCHOOSE structure that contains information used to initialize the dialog box. When this function returns, this structure contains information about the user's format selection.
The pwfx member of this structure must contain a valid pointer to a memory location that will contain the returned format header structure. Moreover, the cbwfx member must be filled in with the size, in bytes, of this memory buffer.
Returns MMSYSERR_NOERROR if successful or an error otherwise. Possible return values include the following.
||The user chose the Cancel button or the Close command on the System menu to close the dialog box.|
||The buffer identified by the pwfx member of the ACMFORMATCHOOSE structure is too small to contain the selected format.|
||At least one flag is invalid.|
||The specified handle is invalid.|
||At least one parameter is invalid.|
||A suitable driver is not available to provide valid format selections.|
|Minimum supported client||Windows 2000 Professional [desktop apps only]|
|Minimum supported server||Windows 2000 Server [desktop apps only]|