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CXTPBufferDC m_hDC is NULL

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URL: http://forum.codejock.com/forum_posts.asp?TID=1437
Printed Date: 07 November 2025 at 3:22am
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Topic: CXTPBufferDC m_hDC is NULL

Posted By: blueseaing
Subject: CXTPBufferDC m_hDC is NULL
Date Posted: 21 November 2004 at 9:10pm

I find rencently ,my xtp baed app ofen occure fail , and I find the pointer of CXTPBufferDC ofen has a Nullo m_hDc, for example,

void CXTPCommandBar::OnPaint()
{
CPaintDC paintDC(this);
CXTPBufferDC dc(paintDC, CXTPClientRect(this));

//========= now if(dc.m_hDC==NULL) will return TRUE============

DrawCommandBar(&dc);

}