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CBaseWindow::GetClassWindowStyles

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Microsoft DirectShow 9.0

CBaseWindow::GetClassWindowStyles

The GetClassWindowStyles method retrieves the window's class styles and window styles.

Syntax

  virtual LPTSTR GetClassWindowStyles(
    DWORD *pClassStyles,
    DWORD *pWindowStyles,
    DWORD *pWindowStylesEx
) PURE;

Parameters

pClassStyles

Pointer to a variable that receives the class styles.

pWindowStyles

Pointer to a variable that receives the window styles.

pWindowStylesEx

Pointer to a variable that receives the extended window styles.

Return Value

Returns a static text string that contains the class name.

Remarks

The CBaseWindow::PrepareWindow method calls this method to retrieve the window's class styles and window styles.

This method is pure virtual; the derived class must implement it. The following example shows a possible implementation:

LPTSTR CMyWindowClass::GetClassWindowStyles(DWORD *pClassStyles,
                                            DWORD *pWindowStyles,
                                            DWORD *pWindowStylesEx)
{
    *pClassStyles = CS_HREDRAW | CS_VREDRAW;
    *pWindowStyles = WS_OVERLAPPEDWINDOW | WS_CLIPCHILDREN;
    *pWindowStylesEx = WS_EX_WINDOWEDGE;
    return TEXT("MyWindowClass");
}

The object uses the class style for the lpszClassName member of a WNDCLASS structure, which it passes to the RegisterClass function. The object uses the window styles for the dwExStyle and dwStyle parameters of the CreateWindowEx function. For more information, see the Platform SDK.

Requirements

**  Header:** Declared in Winutil.h; include Streams.h.

**  Library:** Use Strmbase.lib (retail builds) or Strmbasd.lib (debug builds).

See Also