The tree view should handle cleanup of the individual items when it receives the WM_DESTROY
message, and you probably don't need to set LastCheckedItem
to NULL
unless you need to check its value later on.
Properly handle cleanup of the static HTREEITEM
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26-06-2023 - |
سؤال
I have a main window with a treeview control. I need to track certain changes of a checked item, so I have decided to make a static HTREEITEM
variable to store that handle.
I do not know if setting variable to NULL
in my WM_DESTROY
handler will suffice, or do I need to do something else?
Here are the code snippets that illustrate my dilemma:
LRESULT CALLBACK WndProc(HWND hwnd, UINT msg, WPARAM wParam, LPARAM lParam)
{
static HTREEITEM LastCheckedItem;
// Other parts of the code that work well
case WM_DESTROY:
{
LastCheckedItem = NULL; // or should I do something else ?
// ...
Thank you.
Best regards.
المحلول
نصائح أخرى
You don't need to do any tidy up. When you destroy the tree view it will destroy all of its items.
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