ArcGIS Engine Developer Guide

VISUAL C++
LRESULT CEngineControlsDlg::OnInitDialog(UINT uMsg, WPARAM wParam, LPARAM
lParam, BOOL& bHandled)
{
// Get the Control's interfaces into class member variables.
GetDlgControl(IDC_TOOLBARCONTROL, IID_IToolbarControl, (void **)
&m_ipToolbarControl);
GetDlgControl(IDC_TOCCONTROL, IID_ITOCControl, (void **) &m_ipTOCControl);
GetDlgControl(IDC_PAGELAYOUTCONTROL, IID_IPageLayoutControl, (void **)
&m_ipPageLayoutControl);
// Connect to the controls.
AtlAdviseSinkMap(this, TRUE);
// Set buddy controls.
m_ipTOCControl->SetBuddyControl(m_ipPageLayoutControl);
m_ipToolbarControl->SetBuddyControl(m_ipPageLayoutControl);
return TRUE;
}
Known limitations of Visual Studio C++ Resource Editor and ArcGIS
ActiveX controls
Disabled buddy property on property page
In Visual Studio C++ you cannot set the Buddy property of the TOCControl and
the ToolbarControl through the General property page. Visual C++ does not support
controls finding other controls at design time. However, this step can be
performed in code in the OnInitDialog method.
ToolbarControl not resized to the height of one button
In other environments (Visual Basic 6, .NET) the ToolbarControl will automatically
resize to be one button high. However, in Visual Studio C++ 6 it can be any
size. In MFC and ATL, the ActiveX host classes do not allow controls to determine
their own size.
Design-time property pages disappearing when displaying context-sensitive
help
When viewing the controls property page at design time, right-clicking and clicking
“What’s This?” will cause the help tip to display; however, the property pages
will then close. This is a limitation of the Visual Studio floating windows combined
with the floating tip window from HTML help. Clicking the Help button
provides the same text for the whole property page.
MFC AND THE ACTIVEX CONTROLS
There are many choices for how to work with ArcGIS ActiveX controls in Visual
C++, the first of which is what framework to use to host the controls (for
example, ATL or MFC). A second decision is where the control will be hosted
(Dialog, MDI application, and so forth). This section discusses MFC and hosting
the control on a dialog box.
Chapter 4 • Developer environments • 125