This sample shows how to implement custom properties, events, a property page, and object safety for an ATL control. Go through the to create this control step by step.

Running the Sample

Build Polygon.dll and make sure it is registered. Open the Polyctl.htm file from Internet Explorer. If you click inside the polygon, the number of sides increases. If you click outside the polygon, the number of sides decreases.

This sample uses the following keywords:

ATLASSERT; ATLTRACE; auxWireSphere; BEGIN_COM_MAP; BEGIN_CONNECTION_POINT_MAP; BEGIN_MSG_MAP; BEGIN_OBJECT_MAP; BEGIN_PROPERTY_MAP; CComCoClass; CComControl; CComModule::GetClassObject; CComModule::GetLockCount; CComModule::Init; CComModule::RegisterServer; CComModule::Term; CComModule::UnregisterServer; CComObjectRoot; ChoosePixelFormat; CoTaskMemAlloc; CreateContext; CreateRGBPalette; DECLARE_GET_CONTROLLING_UNKNOWN; DECLARE_REGISTRY_RESOURCEID; DeleteObject; DescribePixelFormat; DisableThreadLibraryCalls; DrawText; END_CONNECTION_POINT_MAP; END_OBJECT_MAP; FireViewChange; GetClientRect; GetPixelFormat; glBegin; glClear; glClearColor; glClearDepth; glColor3f; glEnable; glEnd; glFinish; glLoadIdentity; glMatrixMode; glPopMatrix; glPushMatrix; glRotatef; glTranslatef; gluPerspective; glVertex3f; IDispatchImpl; IObjectSafetyImpl; IOleControlImpl; IOleInPlaceActiveObjectImpl; IOleInPlaceObjectWindowlessImpl ; IOleObjectImpl; IPersistStorageImpl; IPersistStreamInitImpl; IViewObjectExImpl; joyReleaseCapture; joySetThreshold; memcpy; OBJECT_ENTRY; PIXELFORMATDESCRIPTOR; RealizePalette; ReleaseCapture; SelectPalette; SetBkMode; SetCapture; SetTextColor; SwapBuffers; USES_CONVERSION; wglCreateContext; wglDeleteContext; wglGetCurrentDC; wglMakeCurrent