方法一：
方法二：
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void SetWindowBlur(HWND hWnd) { typedef enum _WINDOWCOMPOSITIONATTRIB { WCA_UNDEFINED = 0, WCA_NCRENDERING_ENABLED = 1, WCA_NCRENDERING_POLICY = 2, WCA_TRANSITIONS_FORCEDISABLED = 3, WCA_ALLOW_NCPAINT = 4, WCA_CAPTION_BUTTON_BOUNDS = 5, WCA_NONCLIENT_RTL_LAYOUT = 6, WCA_FORCE_ICONIC_REPRESENTATION = 7, WCA_EXTENDED_FRAME_BOUNDS = 8, WCA_HAS_ICONIC_BITMAP = 9, WCA_THEME_ATTRIBUTES = 10, WCA_NCRENDERING_EXILED = 11, WCA_NCADORNMENTINFO = 12, WCA_EXCLUDED_FROM_LIVEPREVIEW = 13, WCA_VIDEO_OVERLAY_ACTIVE = 14, WCA_FORCE_ACTIVEWINDOW_APPEARANCE = 15, WCA_DISALLOW_PEEK = 16, WCA_CLOAK = 17, WCA_CLOAKED = 18, WCA_ACCENT_POLICY = 19, WCA_FREEZE_REPRESENTATION = 20, WCA_EVER_UNCLOAKED = 21, WCA_VISUAL_OWNER = 22, WCA_HOLOGRAPHIC = 23, WCA_EXCLUDED_FROM_DDA = 24, WCA_PASSIVEUPDATEMODE = 25, WCA_USEDARKMODECOLORS = 26, WCA_LAST = 27 } WINDOWCOMPOSITIONATTRIB; typedef struct _WINDOWCOMPOSITIONATTRIBDATA { WINDOWCOMPOSITIONATTRIB Attrib; PVOID pvData; SIZE_T cbData; } WINDOWCOMPOSITIONATTRIBDATA; typedef enum _ACCENT_STATE { ACCENT_DISABLED = 0, ACCENT_ENABLE_GRADIENT = 1, ACCENT_ENABLE_TRANSPARENTGRADIENT = 2, ACCENT_ENABLE_BLURBEHIND = 3, ACCENT_ENABLE_ACRYLICBLURBEHIND = 4, // RS4 1803 ACCENT_ENABLE_HOSTBACKDROP = 5, // RS5 1809 ACCENT_INVALID_STATE = 6 } ACCENT_STATE; typedef struct _ACCENT_POLICY { ACCENT_STATE AccentState; DWORD AccentFlags; DWORD GradientColor; DWORD AnimationId; } ACCENT_POLICY; const HINSTANCE hModule = LoadLibrary(TEXT("user32.dll")); if (hModule) { typedef BOOL(WINAPI* pSetWindowCompositionAttribute)(HWND, WINDOWCOMPOSITIONATTRIBDATA*); const pSetWindowCompositionAttribute SetWindowCompositionAttribute = (pSetWindowCompositionAttribute)GetProcAddress(hModule, "SetWindowCompositionAttribute"); if (SetWindowCompositionAttribute) { ACCENT_POLICY policy = { ACCENT_ENABLE_BLURBEHIND, 0, 0, 0 }; // ACCENT_ENABLE_BLURBEHIND=3... WINDOWCOMPOSITIONATTRIBDATA data = { WCA_ACCENT_POLICY, &policy, sizeof(WINDOWCOMPOSITIONATTRIBDATA) }; // WCA_ACCENT_POLICY=19 SetWindowCompositionAttribute(hWnd, &data); } FreeLibrary(hModule); } }
HRESULT EnableBlurBehind(HWND hwnd, DM::CRect rcCanvas) { HRESULT hr = S_OK; // Create and populate the blur-behind structure. DWM_BLURBEHIND bb = {0}; // Specify blur-behind and blur region. bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION; bb.fEnable = TRUE; bb.hRgnBlur = ::CreateRectRgnIndirect(rcCanvas); // Enable blur-behind. hr = DwmEnableBlurBehindWindow(hwnd, &bb); return hr; }