代码四

void CQQHideWndDlg::FixMoving(UINT fwSide, LPRECT pRect) { POINT curPos; GetCursorPos(&curPos); INT screenHeight = GetSystemMetrics(SM_CYSCREEN); INT screenWidth = GetSystemMetrics(SM_CXSCREEN); INT height = pRect->bottom - pRect->top; INT width = pRect->right - pRect->left; if (curPos.y <= INTERVAL) { //粘附在上边 pRect->bottom = height - m_edgeHeight; pRect->top = -m_edgeHeight; m_hideMode = HM_TOP; } else if(curPos.y >= (screenHeight - INTERVAL - m_taskBarHeight)) { //粘附在下边 pRect->top = screenHeight - m_taskBarHeight - height; pRect->bottom = screenHeight - m_taskBarHeight; m_hideMode = HM_BOTTOM; } else if (curPos.x < INTERVAL) { //粘附在左边 if(!m_isSizeChanged) { CRect tRect; GetWindowRect(tRect); m_oldWndHeight = tRect.Height(); } pRect->right = width; pRect->left = 0; pRect->top = -m_edgeHeight; pRect->bottom = screenHeight - m_taskBarHeight; m_isSizeChanged = TRUE; m_hideMode = HM_LEFT; } else if(curPos.x >= (screenWidth - INTERVAL)) { //粘附在右边 if(!m_isSizeChanged) { CRect tRect; GetWindowRect(tRect); m_oldWndHeight = tRect.Height(); } pRect->left = screenWidth - width; pRect->right = screenWidth; pRect->top = -m_edgeHeight; pRect->bottom = screenHeight - m_taskBarHeight; m_isSizeChanged = TRUE; m_hideMode = HM_RIGHT; } else { //不粘附 if(m_isSizeChanged) { //如果收缩到两边,则拖出来后会变回原来大小 //在"拖动不显示窗口内容下"只有光栅变回原来大小 pRect->bottom = pRect->top + m_oldWndHeight; m_isSizeChanged = FALSE; } if(m_isSetTimer) { //如果Timer开启了,则关闭之 if(KillTimer(1) == 1) m_isSetTimer = FALSE; } m_hideMode = HM_NONE; GetDlgItem(IDC_TIMER)->SetWindowText("Timer off"); } }

收缩模式和位置决定后，剩下的工作就由最后两个核心函数完成了：实现收缩的DoHide()，实现伸展的DoShow()。在这两个过程中m_hsFinished，m_hiding 这两个变量起到很重要的控制作用。由于伸缩过程没完成时，hsFinished始终为FALSE，所以Timer 2 不会关闭，于是在OnTimer中会重复调用这两个函数之一，在这两个函数体内，窗口位置有规律地递减或递增就可以达到QQ的“抽屉”效果了，有趣的是即使伸缩过程还没完成，你也可以在这个过程中改变m_hiding这个值来决定他是伸还是缩，正如QQ一样。你可以把Timer 2 的事件间隔调大一点，然后在窗口伸缩时，鼠标来回地进出窗口就会很容易看到这样有趣的效果（还没缩进去又被拉了出来，或者还没拉出来又缩进去了）。
　　代码五

void CQQHideWndDlg::DoHide() { if(m_hideMode == HM_NONE) return; CRect tRect; GetWindowRect(tRect); INT height = tRect.Height(); INT width = tRect.Width(); INT steps = 0; switch(m_hideMode) { case HM_TOP: steps = height/HS_STEPS; tRect.bottom -= steps; if(tRect.bottom <= m_edgeWidth) { //你可以把下面一句替换上面的 ...+=|-=steps 达到取消抽屉效果 //更好的办法是添加个BOOL值来控制,其他case同样. tRect.bottom = m_edgeWidth; m_hsFinished = TRUE; //完成隐藏过程 } tRect.top = tRect.bottom - height; break; case HM_BOTTOM: steps = height/HS_STEPS; tRect.top += steps; if(tRect.top >= (GetSystemMetrics(SM_CYSCREEN) - m_edgeWidth)) { tRect.top = GetSystemMetrics(SM_CYSCREEN) - m_edgeWidth; m_hsFinished = TRUE; } tRect.bottom = tRect.top + height; break; case HM_LEFT: steps = width/HS_STEPS; tRect.right -= steps; if(tRect.right <= m_edgeWidth) { tRect.right = m_edgeWidth; m_hsFinished = TRUE; } tRect.left = tRect.right - width; tRect.top = -m_edgeHeight; tRect.bottom = GetSystemMetrics(SM_CYSCREEN) - m_taskBarHeight; break; case HM_RIGHT: steps = width/HS_STEPS; tRect.left += steps; if(tRect.left >= (GetSystemMetrics(SM_CXSCREEN) - m_edgeWidth)) { tRect.left = GetSystemMetrics(SM_CXSCREEN) - m_edgeWidth; m_hsFinished = TRUE; } tRect.right = tRect.left + width; tRect.top = -m_edgeHeight; tRect.bottom = GetSystemMetrics(SM_CYSCREEN) - m_taskBarHeight; break; default: break; } SetWindowPos(&wndTopMost,tRect); }