Fix typo: scaning -> scanning (#5398)

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Author: changeworld

docs/mfc/reference/codesnippet/CPP/cmfctoolbarscustomizedialog-class_2.cpp

@@ -1,5 +1,5 @@
 CMFCToolBarsCustomizeDialog *pDlgCust = new CMFCToolBarsCustomizeDialog(this,
-                                                                        TRUE /* Automatic menus scaning */);
+                                                                        TRUE /* Automatic menus scanning */);
 
 CSliderButton btnSlider(ID_SLIDER);
 btnSlider.SetRange(0, 100);

docs/mfc/reference/codesnippet/CPP/cmfctoolbarscustomizedialog-class_3.cpp

@@ -1,5 +1,5 @@
 CMFCToolBarsCustomizeDialog *pDlgCust = new CMFCToolBarsCustomizeDialog(this,
-                                                                        TRUE /* Automatic menus scaning */,
+                                                                        TRUE /* Automatic menus scanning */,
                                                                         AFX_CUSTOMIZE_MENU_SHADOWS | AFX_CUSTOMIZE_TEXT_LABELS |
                                                                             AFX_CUSTOMIZE_MENU_ANIMATIONS);
 

docs/mfc/reference/codesnippet/CPP/cmfctoolbarscustomizedialog-class_4.cpp

@@ -1,5 +1,5 @@
 CMFCToolBarsCustomizeDialog *pDlgCust = new CMFCToolBarsCustomizeDialog(this,
-                                                                        TRUE /* Automatic menus scaning */,
+                                                                        TRUE /* Automatic menus scanning */,
                                                                         AFX_CUSTOMIZE_MENU_SHADOWS | AFX_CUSTOMIZE_TEXT_LABELS |
                                                                             AFX_CUSTOMIZE_MENU_ANIMATIONS, // default parameters
                                                                         &lstCustomPages);                  // pointer to the list of runtime classes of the custom property pages