DwmShowContact function (dwmapi.h)

Called by an app or framework to specify the visual feedback type to draw in response to a particular touch or pen contact.

Syntax

HRESULT DwmShowContact(
  DWORD           dwPointerID,
  DWM_SHOWCONTACT eShowContact
);

Parameters

dwPointerID

The pointer ID of the contact. Each touch or pen contact is given a unique ID when it is detected.

eShowContact

Return value

If dwPointerID does not match that of a contact currently present on the screen, this function returns E_INVALIDARG; otherwise, it returns S_OK.

Remarks

It is safe to call this function on the UI thread.

Requirements