TVM_HITTESTTVM_HITTEST*
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TVM_HITTEST


TVM_HITTEST 
    wParam = 0; 
    lParam = (LPARAM) (LPTVHITTESTINFO) lpht;

Determines the location of the specified point relative to the client area of a tree view control. You can send this message explicitly or by using the TreeView_HitTest macro.

lpht
Address of a TVHITTESTINFO structure. When the message is sent, the pt member specifies the coordinates of the point to test. When the message returns, the hItem member is the handle to the item at the specified point or NULL if no item occupies the point. Also, when the message returns, the flags member is a hit test value that indicates the location of the specified point. For a list of hit test values, see the description of the TVHITTESTINFO structure.

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