Thread: ListView SetCheck

How do you I set the check mark checked with the SendMessage? I saw on a previous board that there is ListView_SetCheckState, but I searched the <commctrl.h> and it didn't find that macro.

I got this so far:

Code:

void SetItemChecked(HWND hwnd, int index)
{
   LVITEM lvItem;

   lvItem.mask=LVIF_STATE;
   // lvItem.state= //stuck here

   SendMessage(hwnd, LVM_SETITEMSTATE, (WPARAM) (int)index, (LPARAM) (LPLVITEM)lvItem);
}

The constants I found were:
LVIS_ACTIVATING
The item is being activated in an LVN_ITEMACTIVATE notification.

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, so it is surrounded by a standard focus rectangle. Although more than one item may be selected, only one item can have the focus.

LVIS_SELECTED
The item is selected. The appearance of a selected item depends on whether it has the focus and also on the system colors used for selection.


I don't know what constant to enter here. Or if I have to fill out more fields. Any help would be really be appriated.

Thanks.

The easiest way is to use the ListView_SetCheckState macro documented at msdn:
ListView_SetCheckState

For such problems you should first search at msdn - mostly you find the answer fast.

Greetz
Andy

I would use ListView_SetCheck but when I do, the compiler says that it doesn't exist. So I went to commctrl.h so search for it, but it didn't find it. Thats why I wanted another way of setting the check.

Thanks.

I figured it out...finially

Code:

void SetItemChecked(HWND hwnd, int index)
{
   LVITEM lvItem;

   lvItem.stateMask=LVIS_STATEIMAGEMASK;
   lvItem.state=INDEXTOSTATEIMAGEMASK(2);

   SendMessage(this->hwnd, LVM_SETITEMSTATE, index, (LPARAM)&lvItem);
}

lvItem.state=INDEXTOSTATEIMAGEMASK(2);
2 means the box will be checked
1 means the box will be unchekced
0 means there won't be a box