Merge pull request #5113 from MicrosoftDocs/main

11/20/2023 AM Publish

Author: PhilKang0704

docs/code-quality/c6201.md

@@ -1,16 +1,15 @@
 ---
 description: "Learn more about: Warning C6201"
 title: Warning C6201
-ms.date: 09/28/2022
+ms.date: 11/17/2023
 f1_keywords: ["C6201", "INDEX_EXCEEDS_MAX", "__WARNING_INDEX_EXCEEDS_MAX"]
 helpviewer_keywords: ["C6201"]
-ms.assetid: eefbbd77-007c-4f28-95f6-6de5ee6a27db
 ---
 # Warning C6201
 
 > Index '*index-name*' is out of valid index range '*minimum*' to '*maximum*' for possibly stack allocated buffer '*variable*'
 
-This warning indicates that an integer offset into the specified stack array exceeds the maximum bounds of that array. It may potentially cause stack overflow errors, random behavior, or crashes.
+This warning indicates that an integer offset into the specified stack array exceeds the maximum bounds of that array. It might potentially cause stack overflow errors, undefined behavior, or crashes.
 
 ## Remarks
 
@@ -45,3 +44,9 @@ void f()
     }
 }
 ```
+
+## Heuristics
+
+This analysis is limited to stack-allocated arrays. It doesn't consider, for example, arrays passed into the function with a Microsoft source code annotation language ([SAL](understanding-sal.md))-annotated length.
+
+This analysis can't catch all possible out of bounds indices because not all arithmetic can be precisely analyzed. It's tuned to report cases where it can guarantee an out of bounds index is possible. The absence of a warning doesn't mean the index is guaranteed to be in bounds.

docs/mfc/setting-the-dialog-boxs-background-color.md

@@ -1,17 +1,33 @@
 ---
 description: "Learn more about: Setting the Dialog Box's Background Color"
 title: "Setting the Dialog Box's Background Color"
-ms.date: "07/12/2018"
+ms.date: 11/17/2023
 helpviewer_keywords: ["CSS, background attributes in styles [MFC]", "HTML element formatting, background attributes", "colors, dialog box", "dialog boxes [MFC], colors", "background colors, dialog boxes", "MFC dialog boxes [MFC], colors"]
-ms.assetid: 05ee28a4-f3ae-4203-84ac-022f266ff2ab
 ---
 # Setting the Dialog Box's Background Color
 
-You can set the background color of your dialog boxes by handling WM_CTLCOLOR messages for the dialog box window. The color you set is used for only the specified dialog box.
+You can set the background color of your dialog boxes by handling `WM_CTLCOLOR` messages for the dialog box window. The color you set is used for only the specified dialog box.
 
-See [codexpert blog](https://codexpert.ro/blog/2013/03/13/painting-the-dialog-backround/) for an example.
+For example, the following code fragment sets the background color of the dialog box to dark grey. The `OnCtlColor` member function is called whenever the dialog box is redrawn:
+
+```cpp
+HBRUSH CAboutDlg::OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor)
+{
+    return (HBRUSH)GetStockObject(DKGRAY_BRUSH);
+}
+```
+
+For the previous code fragment to work:
+- add `virtual HBRUSH OnCtlColor(CDC* pDC, CWnd* pWnd, UINT nCtlColor);` to the `protected:` section of the class definition for your dialog.
+- add the following to the class definition for your dialog, and change `CMyDialog` to the name of your dialog class:
+
+```cpp
+BEGIN_MESSAGE_MAP(CMyDialog, CDialogEx)
+    ON_WM_CTLCOLOR()
+END_MESSAGE_MAP()
+```
 
 ## See also
 
-[Working with Dialog Boxes in MFC](../mfc/life-cycle-of-a-dialog-box.md)<br/>
+[Working with Dialog Boxes in MFC](../mfc/life-cycle-of-a-dialog-box.md)\
 [Handling Windows Messages in Your Dialog Box](../mfc/handling-windows-messages-in-your-dialog-box.md)