Protected override void WndProc(ref Message message)
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The following C# code shows how to use the WndProc method to retrieve WM_KEYDOWN messages: using Before returning, the method must call the base WndProc method to ensure that unprocessed messages are handled properly. The overridden method is called each time a new message is placed in the form's message queue.
The WndProc method is a member of the NativeWindow class found in the namespace. NET Framework, you must implement the WndProc method to retrieve messages. To identify the event that triggered a WM_INPUT message, your application must parse the data passed to the window procedure as the lParam parameter. If (RegisterRawInputDevices(Rid, 1, sizeof(Rid)) = FALSE)ĮrrorExit() // Add error-handling code here. The following example C++ code registers the device to receive input from the controls defined on the vendor-defined usage page that have a usage of 0x88: RAWINPUTDEVICE Rid Each RAWINPUTDEVICE structure passed to this function specifies one usage page and usage. You can do this by using the Win32® function RegisterRawInputDevices. To process WM_INPUT messages, the application must first register the devices from which it receives data. The following table shows the HID mapping of these buttons. Buttonīuttons that generate WM_INPUT messages are defined according to the Human Interface Device (HID) specification. The following table shows the associated messages and keyboard equivalents for the compulsory and optional buttons on the remote control. This topic describes the Windows commands generated by the remote control device driver and how to retrieve them so that your application can respond appropriately to input.
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