LVM_SETCALLBACKMASK

  • Article

This message sets the callback mask for a list-view control. You can send this message explicitly or by using the ListView_SetCallbackMask macro.

LVM_SETCALLBACKMASK wParam = (WPARAM)(UINT) mask; 
  lParam = 0;

Parameters

  • mask
    Value of the callback mask. The bits of the mask indicate the item states or images for which the application stores the current state data. It can be any combination of the following constants.

    Constant Description
    LVIS_CUT The item is marked for a cut-and-paste operation.
    LVIS_DROPHILITED The item is highlighted as a drag-and-drop target.
    LVIS_FOCUSED The item has the focus.
    LVIS_SELECTED The item is selected.
    LVIS_OVERLAYMASK The application stores the image list index of the current overlay image for each item.
    LVIS_STATEIMAGEMASK The application stores the image list index of the current state image for each item.

    The callback mask of a list-view control is a set of bit flags that specify the item states for which the application, rather than the control, stores the current data. The callback mask applies to all of the control items, unlike the callback item designation, which applies to a specific item. The callback mask is zero by default, meaning that the list-view control stores all item state data. After creating a list-view control and initializing its items, you can send the LVM_SETCALLBACKMASK message to change the callback mask. To get the current callback mask, send the LVM_GETCALLBACKMASK message.

    For more information about overlay images and state images, see List-View Image Lists.

    For more information on overlay images, state images, and list-view callbacks, see User Interface Services.

  • lParam
    Not used.

Return Values

TRUE indicates success. FALSE indicates failure.

Remarks

Related macro:ListView_SetCallbackMask

Requirements

OS Versions: Windows CE 1.0 and later.
Header: Commctrl.h.

See Also

ListView_SetCallbackMask | List-View Controls Messages

Last updated on Wednesday, April 13, 2005

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