求教CScrollView问题

Question

我用VS2008的Feature Pack建立一个基于CView的SDI程序，后来想在原程序上把CView改为CScrollView从而实现滚动视图的功能，但是我改完后，在 debug模式下运行程序，会出现发送错误对话框（提示程序遇到问题需要关闭），点击对话框上的调试按钮，程序停留在dbgrptt.c文件以下代码处：

/* These methods don't need a separate

   wchar version. Hence they need to be compiled only once from

   the original file */



_CRTIMP void _cdecl _CrtDbgBreak(

    void

    )

{

    DebugBreak();

}  <--停留在此处

点击continue按钮，程序停留在viewscrl.cpp文件的以下代码处:

/////////////////////////////////////////////////////////////////////////////

// CScrollView painting



void CScrollView::OnPrepareDC(CDC* pDC, CPrintInfo* pInfo)

{

	ASSERT_VALID(pDC);



#ifdef _DEBUG

	if (m_nMapMode == MM_NONE)

	{

		TRACE(traceAppMsg, 0, "Error: must call SetScrollSizes() or SetScaleToFitSize()");

		TRACE(traceAppMsg, 0, "\tbefore painting scroll view.\n");

		ASSERT(FALSE);  <--


停留在此处








		return;

	}

#endif //_DEBUG

但是后来我把程序改成release模式时程序就能正常运行了，请教各位大侠这到底是为什么呀？有什么解决方法么？谢谢！！！

Answer 1

Error: must call SetScrollSizes() or SetScaleToFitSize()
这里不是说得很明白了么？
要设大小才知道滚动条是否该创建啊

---

---

Please mark the post answered your question as the answer, and click the chartreuse pyramid floating over nothingness/null to mark other helpful posts as helpful. This posting is provided "AS IS" with no warranties, and confers no rights.
Visual C++ MVP

Answer 2

同求！急啊！谢谢了！