The acmFormatChooseHookProc function specifies a user-defined function that hooks the acmFormatChoose dialog box. The acmFormatChooseHookProc name is a placeholder for an application-defined name.
UINT ACMFORMATCHOOSEHOOKPROC acmFormatChooseHookProc(
HWND hwnd,
UINT uMsg,
WPARAM wParam,
LPARAM lParam
);
If the hook function processes one of the WM_CTLCOLOR messages, this function must return a handle of the brush that should be used to paint the control background.
A hook function can optionally process the MM_ACM_FORMATCHOOSE message.
You should use this function the same way as you use the Common Dialog hook functions for customizing common dialog boxes.
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Unsupported.
Header: Declared in msacm.h.
Import Library: User-defined.
Unicode: Defined as Unicode and ANSI prototypes.
Audio Compression Manager Overview, Audio Compression Functions, acmFormatChoose, MM_ACM_FORMATCHOOSE