ITaskbarList3::RegisterTab method (shobjidl_core.h)
Informs the taskbar that a new tab or document thumbnail has been provided for display in an application's taskbar group flyout.
Syntax
HRESULT RegisterTab(
[in] HWND hwndTab,
[in] HWND hwndMDI
);
Parameters
[in] hwndTab
Type: HWND
Handle of the tab or document window. This value is required and cannot be NULL.
[in] hwndMDI
Type: HWND
Handle of the application's main window. This value tells the taskbar which application's preview group to attach the new thumbnail to. This value is required and cannot be NULL.
Return value
Type: HRESULT
Returns S_OK if successful, or an error value otherwise. If either parameter is NULL, this method returns an error.
Remarks
By itself, registering a tab thumbnail alone will not result in its being displayed. You must also call ITaskbarList3::SetTabOrder to instruct the group where to display it.
Requirements
| Requirement | Value |
|---|---|
| Minimum supported client | Windows 7 [desktop apps only] |
| Minimum supported server | Windows Server 2008 R2 [desktop apps only] |
| Target Platform | Windows |
| Header | shobjidl_core.h (include Shobjidl.h) |
| Library | Explorerframe.lib |
| DLL | Explorerframe.dll |