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Would like to ask some questions regarding the scrollbar of a ListBox (WS_VSCROLL).
1- Is possible to change the transparency of the scrollbar?
2- Is possible to change the position of the scrollbar?
https://learn.microsoft.com/en-us/windows/win32/controls/wm-ctlcolorscrollbar
I thought in handle the message ctlcolorscrollbar and return a nullbrush, but as pointed:
Scrollbars attached to a window (WS_SCROLL and WS_VSCROLL) do not generate this message
I'm working on creating a custom Listbox with custom scrollbars
trying to find a way to keep the VScrollbar but keep it invisible, then I could draw a fake click-through custom scrollbar above it.
The default Listbox Scrollbar is drawn by the Listbox
You must use a Scrollbar control : Scroll Bar to customize it
There is also Flat Scrollbars, but old now
A test with both (Red is a Flat Scrollbar, Magenta a Scrollbar control) :
Could you provide the code? is also possible to change the transparency only of the scroll bar?
I just copied the code from MSDN docs and I added WM_CTLCOLORSCROLLBAR :
// In the main WndProc
static HBRUSH hBrush = NULL;
// then
case WM_CTLCOLORSCROLLBAR:
{
if (!hBrush)
hBrush = CreateSolidBrush(RGB(255, 0, 255));
SetBkColor((HDC)wParam, RGB(255, 0, 255));
return((LRESULT)hBrush);
}
break;
You can change transparency with WS_EX_LAYERED and SetLayeredWindowAttributes
(needs a Manifest with <supportedOS Id="{8e0f7a12-bfb3-4fe8-b9a5-48fd50a15a9a}" />)
