\nYou might have an application (like a game) where the default\ntouch contact visualizations are a distraction.\nIn WinRT, you can disable the contact visualizations by simply saying\n<\/p>\n
\n\/\/ JavaScript\nWindows.UI.Input.PointerVisualizationSettings.\n getForCurrentView().\n isContactFeedbackEnabled = false;\n\/\/ C#\nWindows.UI.Input.PointerVisualizationSettings.\n GetForCurrentView().\n IsContactFeedbackEnabled = false;\n\/\/ C++\nWindows::UI::Input::PointerVisualizationSettings::\n GetForCurrentView()->\n IsContactFeedbackEnabled = false;\n<\/pre>\n\nIn Win32, you use the\n
SetWindowFeedbackSetting<\/code> function.\nTo demonstrate that, let’s take our\n\nscratch program<\/a>\nand make\nthis simple change:\n<\/p>\n\nBOOL\nOnCreate(HWND hwnd, LPCREATESTRUCT lpcs)\n{\n BOOL fEnabled = FALSE;\n SetWindowFeedbackSetting(hwnd,\n FEEDBACK_TOUCH_CONTACTVISUALIZATION,\n 0, sizeof(fEnabled), &fEnabled);<\/font>\n return TRUE;\n}\n<\/pre>\n\nThe touch visualizations are white and the default\nwindow color is white, so the visualizations are hard to see\nin the scratch program.\nLet’s change the color to something that the visualizations will\nbe more visible against.\n<\/p>\n
\n wc.hbrBackground = (HBRUSH)(COLOR_WINDOWTEXT<\/font> + 1<\/a>);\n<\/pre>\n\nRun the program, and you’ll see that if you touch the window\nand drag your finger around,\nthere is no little white circle\nand no white streak that follows your finger.\n(Note, however, that the\nOptimize visual feedback for projection to an external monitor<\/i>,\nsetting overrides the\n
FEEDBACK_TOUCH_CONTACTVISUALIZATION<\/code> setting,\nso if you have projection contacts enabled, then you still get the\ndark circles.\nAnother way to get dark circles is to stay up late and not get enough\nsleep.)\n<\/p>\n\nAlthough we disabled contact visualizations,\nwe still get visualizations for gestures like tap\nor tap-and-hold.\nWe can turn those off, too:\n<\/p>\n
\nBOOL\nOnCreate(HWND hwnd, LPCREATESTRUCT lpcs)\n{\n BOOL fEnabled = FALSE;\n SetWindowFeedbackSetting(hwnd,\n FEEDBACK_TOUCH_CONTACTVISUALIZATION,\n 0, sizeof(fEnabled), &fEnabled);\n SetWindowFeedbackSetting(hwnd,\n FEEDBACK_TOUCH_TAP,\n 0, sizeof(fEnabled), &fEnabled);\n SetWindowFeedbackSetting(hwnd,\n FEEDBACK_TOUCH_DOUBLETAP,\n 0, sizeof(fEnabled), &fEnabled);\n SetWindowFeedbackSetting(hwnd,\n FEEDBACK_TOUCH_PRESSANDHOLD,\n 0, sizeof(fEnabled), &fEnabled);\n SetWindowFeedbackSetting(hwnd,\n FEEDBACK_TOUCH_RIGHTTAP,\n 0, sizeof(fEnabled), &fEnabled);<\/font>\n return TRUE;\n}\n<\/pre>\n