dwExStyle
Specifies the extended style of the control being created. For a list of extended Windows styles, see the dwExStyle parameter for CreateWindowEx in the Platform SDK.
dwStyle
Specifies the toolbar control's style. Toolbars must always have the WS_CHILD style. In addition, you can specify any combination of toolbar styles and window styles as described in the Remarks section of Create.
rect
A reference to a RECT structure describing the size and position of the window to be created, in client coordinates of pParentWnd.
pParentWnd
A pointer to the window that is the control's parent.