/// <summary>
/// Open a Wintab context that will send packet events to a message window.
/// </summary>
/// <returns>Returns true if successful.</returns>
public bool Open()
{
// Get the handle of the anonymous MessageEvents window. This is a
// static (global) object, so there's only one of these at a time.
WMessageEvents.Start();
HWND hwnd = WMessageEvents.WindowHandle;
try {
m_hCTX = WNativeMethods.WTOpen(hwnd, ref m_logContext, true);
} catch (Exception ex) {
throw new Exception("FAILED OpenContext: " + ex.ToString());
}
return(m_hCTX.IsValid);
}
/// <summary>
/// Initialize this data object.
/// </summary>
/// <param name="context_I">logical context for this data object</param>
private void Init(WContext context_I)
{
try {
if (context_I == null)
{
throw new Exception("Trying to init CWintabData with null context.");
}
m_context = context_I;
// Watch for the Wintab WT_PACKET event.
WMessageEvents.WatchMessage((int)EWintabEventMessage.WT_PACKET);
} catch (Exception ex) {
throw new Exception("FAILED CWintabData.Init: " + ex.ToString());
}
}
/// <summary>
/// Close the context for this object.
///
/// </summary>
/// <returns>true if context successfully closed</returns>
public bool Close()
{
bool status = false;
try {
if (!m_hCTX.IsValid)
{
throw new Exception("CloseContext: invalid context");
}
status = WNativeMethods.WTClose(m_hCTX);
m_hCTX = HCTX.Zero;
m_logContext = new WintabLogContext();
WMessageEvents.Close();
} catch (Exception ex) {
throw new Exception("FAILED CloseContext: " + ex.ToString());
}
return(status);
}
