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ListView_SetCallbackMask info  Overview  Group

The ListView_SetCallbackMask macro changes the callback mask for a list view control. You can use this macro or explicitly send the LVM_SETCALLBACKMASK message.

BOOL ListView_SetCallbackMask(

    WND hwnd,

    UINT mask



Handle to the list view control.
Specifies the 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. This value can be any combination of the following constants:




The item is marked for a cut-and-paste operation.


The item is highlighted as a drag-and-drop target.


The item has the focus.


The item is selected.


The application stores the image list index of the current overlay image for each item.


The application stores the image list index of the current state image for each item.

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

Return Values

Returns TRUE if successful or FALSE otherwise.


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 controlís 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 information. After creating a list view control and initializing its items, you can use the ListView_SetCallbackMask macro or LVM_SETCALLBACKMASK message to change the callback mask. To get the current callback mask, send the LVM_GETCALLBACKMASK message.

For more information, see Callback Items and the Callback Mask.

See Also


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