Create Placeholder for Helper Windows
The MapForceControlPlaceHolder control is required to host an application helper window, see also Integration at Document Level. In the code listing below, the HTML object tag is used to instantiate a control that will host the Libraries window by default (PlaceholderWindowID is 0).
<!-- create helper window placeholder control. -->
The example HTML page includes a few buttons which call the BtnHelperWindow method when clicked. The BtnHelperWindow method reassigns the PlaceholderWindowID of the control, and thus cause the ActiveX object to display a different helper window.
// specify which of the helper windows shall be shown in the placeholder control.
For the list of possible values of PlaceholderWindowID, see MapForceControlPlaceholderWindow.