Win32 (GDI) - set opacity to STATIC Control
I am using C - (NO MFC or GDI +) : -)
I want to set the opacity of my child window to say 100 (my child window is a control STATIC
). I was wondering if this is possible, and if so, someone can point me in the right direction on how to do this.
Here's my setup:
I create a parent window like this:
HWND hWnd;
WNDCLASS wndCls_s;
wndCls_s.style = CS_HREDRAW | CS_VREDRAW | CS_OWNDC;
wndCls_s.lpfnWndProc = MainWndProc;
wndCls_s.cbClsExtra = 0;
wndCls_s.cbWndExtra = 0;
wndCls_s.hInstance = hInstance;
wndCls_s.hIcon = LoadIcon(hInstance, MAKEINTRESOURCE(IDI_BSN_64));
wndCls_s.hCursor = LoadCursor(NULL, IDC_ARROW);
wndCls_s.hbrBackground = CreateSolidBrush(RGB(0, 0, 0));
wndCls_s.lpszMenuName = NULL;
wndCls_s.lpszClassName = pszCName;
if (RegisterClass(&wndCls_s) == 0)
return EXIT_FAILURE;
/* Creating Window */
hWnd = CreateWindow(
pszCName, pszCName,
WS_VISIBLE | WS_POPUP | WS_SYSMENU | WS_CLIPCHILDREN,
0, 0, WND_WIDTH, WND_HEIGHT,
NULL, NULL, hInstance, NULL);
In my MainWndProc
:
case WM_CREATE:
{
HWND hWndChild = CreateWindow(
L"STATIC", (LPCTSTR) NULL,
WS_CHILD | WS_VISIBLE,
10, 10, 110, 110,
hWnd, (HMENU) (int) 10000,
g_hInst, NULL);
}
break;
case WM_CTLCOLORSTATIC:
{
COLORREF dwColor;
dwColor = RGB(255, 0, 0);
hDC = (HDC) wParam;
//SetBkColor(hDC, dwColor);
SetBkMode(hDC, TRANSPARENT);
/*
This is not going to work for child window
SetWindowLong(
hWnd, GWL_EXSTYLE,
GetWindowLong((HWND)lParam, GWL_EXSTYLE) & ~WS_EX_LAYERED);
SetLayeredWindowAttributes(
(HWND)lParam, 0, 100, LWA_ALPHA);
RedrawWindow((HWND)lParam, NULL, NULL, RDW_ERASE | RDW_INVALIDATE);
*/
if (g_hBrushRed == NULL)
g_hBrushRed = CreateSolidBrush(dwColor);
}
return (INT_PTR)g_hBrushRed;
+3
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