#Multitouch app code#

The following code example shows how these values could be tested. For example, to test for Windows Touch, you would test that the seventh-order bit is set (0x40 in hex). To test the result from the command for a particular feature, you can use the bitwise & operator and the particular bit you are testing. The following table shows the bits for the various fields. GetSystemMetrics returns a bit field that indicates whether the device is ready, whether the device supports pen or touch, whether the input device is integrated or external, and whether the device supports multiple inputs (Windows Touch). The GetSystemMetrics function can be used to query the capabilities of the input digitizer by passing in the nIndex value of SM_DIGITIZER. Testing the Capabilities of the Input Digitizer

This message indicates the various states of contact with a digitizer. The message used for Windows Touch is WM_TOUCH.

Test the capabilities of the input digitizer.

The following steps are typically performed when working with Windows Touch messages: This section explains the tasks associated with getting Windows Touch input to function in your application.