怎么滚动条松开鼠标才触发事件?
我想利用滑块调节音量
声明CSliderCtrl m_VolumeSlideCtrl
void CLeftBarDlg::OnHScroll(UINT nSBCode, UINT nPos, CScrollBar* pScrollBar)
{
// TODO: Add your message handler code here and/or call default
if (m_VolumeSlideCtrl.m_hWnd)
{
if (m_VolumeSlideCtrl.m_hWnd == pScrollBar->m_hWnd)
{
nPos = m_VolumeSlideCtrl.GetPos();
if (m_pConfDlg && m_pConfDlg->m_pMediaController)
m_pConfDlg->m_pMediaController->SetPlayVolume(nPos);
}
}
CDialog::OnHScroll(nSBCode, nPos, pScrollBar);
}
结果松开鼠标后音量大小才改变,怎么回事?