Day: December 16, 2019

win32发消息触发窗口拖动

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	::ReleaseCapture();
	::SendMessage(m_hWnd, WM_NCLBUTTONDOWN, HTCAPTION, NULL);
	::SendMessage(m_hWnd, WM_LBUTTONUP, NULL, NULL);

win32限制改变窗口大小

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响应WM_SIZING消息，消息函数中做如下处理

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void CDemoDlg::OnSizing(UINT fwSide, LPRECT pRect)
{
	if (pRect->right - pRect->left < minWidth_)
	{
		if (fwSide == WMSZ_LEFT
			|| fwSide == WMSZ_TOPLEFT
			|| fwSide == WMSZ_BOTTOMLEFT)
		{
			pRect->left = pRect->right - minWidth_;
		}
		else
			pRect->right = pRect->left + minWidth_;
	}
	if (pRect->bottom - pRect->top < memHdcHeight_)
	{
		if (fwSide == WMSZ_TOP
			|| fwSide == WMSZ_TOPLEFT
			|| fwSide == WMSZ_TOPRIGHT)
		{
			pRect->top = pRect->bottom - minHeight_;
		}
		else
			pRect->bottom = pRect->top + minHeight_;
	}
 
	CDialogEx::OnSizing(fwSide, pRect);
}