我正在使用C - (无MFC或GDI +): - )
我想要的是将我的子窗口的不透明度设置为100(我的子窗口是STATIC
控件)。我想知道这是否可能,如果有的话,请有人指出我正确的指导方针。
这是我的设置:
我创建了我的父窗口,如下所示:
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);
在我的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;
答案 0 :(得分:2)
如果要为背景返回有效的画笔,为什么要使用TRANSPARENT
启用透明度?您不需要SetBkMode
,然后控件将使用您的红色画笔。