ACMFORMATCHOOSEHOOKPROC callback function (msacm.h)

Article
02/22/2024

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.

Syntax

ACMFORMATCHOOSEHOOKPROC Acmformatchoosehookproc;

UINT Acmformatchoosehookproc(
  HWND hwnd,
  UINT uMsg,
  WPARAM wParam,
  LPARAM lParam
)
{...}

Parameters

hwnd

Window handle for the dialog box.

uMsg

Window message.

wParam

Message parameter.

lParam

Message parameter.

Return value

None

Remarks

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.

Requirements

Requirement	Value
Minimum supported client	Windows 2000 Professional [desktop apps only]
Minimum supported server	Windows 2000 Server [desktop apps only]
Target Platform	Windows
Header	msacm.h