Flat-Style Drawing
To enable the flat drawing style, you will need to set the CBRS_EX_FLATSTYLE extended style while creating a docking window. Alternatively, you can set the flat drawing style later by calling SetExBarStyle (a member of the SECControlBar class).
Text inside a gripper window is taken from the window caption which can be set during the creation of a window, or later in the program by calling the SetWindowText function (a member of the CWnd class).
Figure 82 – Flat-Style Horizontal Gripper with Close and Expand Buttons Enabled
Figure 83 – Flat-Style Vertical Gripper with Close and Expand Buttons Enabled
To view sample code which shows how to enable the flat-style mode of docking windows during creation time, please see the CMainFrame::OnCreate function implementation in MAINFRM.cpp, VIZ sample.
 
m_wndProjectWorkspace.Create(this, _T("Project Workspace"),
CBRS_RIGHT | WS_VISIBLE | CBRS_SIZE_DYNAMIC,
CBRS_EX_STDCONTEXTMENU | CBRS_EX_ALLOW_MDI_FLOAT |
CBRS_EX_COOL | CBRS_EX_BORDERSPACE | CBRS_EX_FLATSTYLE,
ID_PROJECTWORKSPACE);
The VIZ sample demonstrates this feature and can be found in the Samples\Toolkit\MFC\Docking directory.