1. case WM_PAINT:
2. {
3. PAINTSTRUCT ps;
4. HDC hDC = BeginPaint(hWnd, &ps);
5. //不要直接使用窗口句柄创建Graphics，会导致闪烁
6. Graphics graph(hDC);
7. //清除客户区域
8. RECT rcClient;
9. GetClientRect(hWnd, &rcClient);
10. BOOL bCompEnabled;
11. DwmIsCompositionEnabled(&bCompEnabled);
12. SolidBrush br(bCompEnabled? Color::Black : Color::DarkGray);
13. graph.FillRectangle(&br, Rect(rcClient.left, rcClient.top,
14. rcClient.right, rcClient.bottom));
15. EndPaint(hWnd, &ps);
16. }
17. break;

Specifies Desktop Window Manager (DWM) blur-behind properties. Used by the DwmEnableBlurBehindWindow function.

Syntax

typedef struct _DWM_BLURBEHIND {DWORD dwFlags;BOOL  fEnable;HRGN  hRgnBlur;BOOL  fTransitionOnMaximized;
} DWM_BLURBEHIND, *PDWM_BLURBEHIND;

Members

dwFlags

A bitwise combination of DWM Blur Behind constant values that indicates which of the members of this structure have been set.

fEnable

TRUE to register the window handle to DWM blur behind; FALSE to unregister the window handle from DWM blur behind.

hRgnBlur

The region within the client area where the blur behind will be applied. A NULL value will apply the blur behind the entire client area.

fTransitionOnMaximized

TRUE if the window's colorization should transition to match the maximized windows; otherwise, FALSE.

1. //初始化GDI+
2. ULONG_PTR token;
3. GdiplusStartupInput input;
4. GdiplusStartup(&token, &input, NULL);
5. //*********************************
6. //关闭GDI+
7. GdiplusShutdown(token);

1. DWM_BLURBEHIND bb = {0};
2. bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
3. bb.fEnable = true;
4. bb.hRgnBlur = NULL;
5. DwmEnableBlurBehindWindow(hWnd, &bb);

1. RECT rect;
2. GetWindowRect(hWnd, &rect);
3. int width = 300, height = 200;
4. //居中椭圆形
5. HRGN hRgn = CreateEllipticRgn((rect.right - rect.left)/2 - width/2,
6. (rect.bottom - rect.top)/2 - height/2, (rect.right - rect.left)/2 + width/2,
7. (rect.bottom - rect.top)/2 + height/2);
8. DWM_BLURBEHIND bb = {0};
9. bb.dwFlags = DWM_BB_ENABLE | DWM_BB_BLURREGION;
10. bb.fEnable = true;
11. bb.hRgnBlur = hRgn;
12. DwmEnableBlurBehindWindow(hWnd, &bb);

1. MARGINS margins = {50, 50, 50, 50};
2. DwmExtendFrameIntoClientArea(hWnd, &margins);

1. MARGINS margins2 = {-1};    //将扩展到整个客户区
2. DwmExtendFrameIntoClientArea(hWnd, &margins2);

1. Bitmap bmp  = Bitmap::FromFile(L"Ferrari.png", false);

1. //绘制图形
2. int width = bmp->GetWidth();
3. int height = bmp->GetHeight();
4. Rect rc(30, 30, width, height);
5. graph.DrawImage(bmp, rc, 0, 0, width, height, UnitPixel);

1. HRESULT DrawThemeTextEx(          HTHEME hTheme,
2. HDC hdc,
3. int iPartId,
4. int iStateId,
5. LPCWSTR pszText,
6. int iCharCount,
7. DWORD dwFlags,
8. LPRECT pRect,
9. const DTTOPTS *pOptions
10. );

1. //绘制发光文字
2. void DrawGlowingText(HDC hDC, LPWSTR szText, RECT &rcArea,
3. DWORD dwTextFlags = DT_LEFT | DT_VCENTER | DT_SINGLELINE, int iGlowSize = 10)
4. {
5. //获取主题句柄
6. HTHEME hThm = OpenThemeData(GetDesktopWindow(), L"TextStyle");
7. //创建DIB
8. HDC hMemDC = CreateCompatibleDC(hDC);
9. BITMAPINFO bmpinfo = {0};
10. bmpinfo.bmiHeader.biSize = sizeof(bmpinfo.bmiHeader);
11. bmpinfo.bmiHeader.biBitCount = 32;
12. bmpinfo.bmiHeader.biCompression = BI_RGB;
13. bmpinfo.bmiHeader.biPlanes = 1;
14. bmpinfo.bmiHeader.biWidth = rcArea.right - rcArea.left;
15. bmpinfo.bmiHeader.biHeight = -(rcArea.bottom - rcArea.top);
16. HBITMAP hBmp = CreateDIBSection(hMemDC, &bmpinfo, DIB_RGB_COLORS, 0, NULL, 0);
17. if (hBmp == NULL) return;
18. HGDIOBJ hBmpOld = SelectObject(hMemDC, hBmp);
19. //绘制选项
20. DTTOPTS dttopts = {0};
21. dttopts.dwSize = sizeof(DTTOPTS);
22. dttopts.dwFlags = DTT_GLOWSIZE | DTT_COMPOSITED;
23. dttopts.iGlowSize = iGlowSize;  //发光的范围大小
24. //绘制文本
25. RECT rc = {0, 0, rcArea.right - rcArea.left, rcArea.bottom - rcArea.top};
26. HRESULT hr = DrawThemeTextEx(hThm, hMemDC, TEXT_LABEL, 0, szText, -1, dwTextFlags , &rc, &dttopts);
27. if(FAILED(hr)) return;
28. BitBlt(hDC, rcArea.left, rcArea.top, rcArea.right - rcArea.left,
29. rcArea.bottom - rcArea.top, hMemDC, 0, 0, SRCCOPY | CAPTUREBLT);
30. //Clear
31. SelectObject(hMemDC, hBmpOld);
32. DeleteObject(hBmp);
33. DeleteDC(hMemDC);
34. CloseThemeData(hThm);
35. }

1. //绘制文本
2. RECT rcText = {10, 10, 300, 40};
3. DrawGlowingText(hDC, L"  一点点中文 and some english", rcText);

1. HRESULT hr = S_OK;
2. HTHUMBNAIL thumbnail = NULL;
3. HWND hWndSrc = FindWindow(_T("QQPlayer Window"), NULL);
4. hr = DwmRegisterThumbnail(hWnd, hWndSrc, &thumbnail);
5. if (SUCCEEDED(hr))
6. {
7. RECT rc;
8. GetClientRect(hWnd, &rc);
9. DWM_THUMBNAIL_PROPERTIES dskThumbProps;
10. dskThumbProps.dwFlags = DWM_TNP_RECTDESTINATION | DWM_TNP_VISIBLE | DWM_TNP_OPACITY ;
11. dskThumbProps.fVisible = TRUE;
12. dskThumbProps.opacity = 200;
13. dskThumbProps.rcDestination = rc;
14. hr = DwmUpdateThumbnailProperties(thumbnail,&dskThumbProps);
15. }