Windows判断某窗口是否被其他窗口完全覆盖

bool IsCoveredByOtherWindow(HWND hWnd)
{// 1. 基本有效性检查if (!IsWindow(hWnd))return true;// 2. 如果窗口不可见或最小化，认为被覆盖if (!IsWindowVisible(hWnd) || IsIconic(hWnd))return true;// 3. 获取窗口矩形RECT rect;if (!GetWindowRect(hWnd, &rect))return true;LONG width = rect.right - rect.left;LONG height = rect.bottom - rect.top;if (width <= 0 || height <= 0)return true;// 4. 定义采样点（9个）POINT points[9] = {0};// 左上points[0] = { rect.left, rect.top };// 右上points[1] = { rect.right - 1, rect.top };// 左下points[2] = { rect.left, rect.bottom - 1 };// 右下points[3] = { rect.right - 1, rect.bottom - 1 };// 上中points[4] = { rect.left + width / 2, rect.top };// 下中points[5] = { rect.left + width / 2, rect.bottom - 1 };// 左中points[6] = { rect.left, rect.top + height / 2 };// 右中points[7] = { rect.right - 1, rect.top + height / 2 };// 中心points[8] = { rect.left + width / 2, rect.top + height / 2 };// 5. 检查每个采样点for (const auto& pt : points) {HWND hWndAtPt = WindowFromPoint(pt);// 如果点所在窗口是目标窗口或其子窗口，则至少有一部分可见if ((hWndAtPt == hWnd) || IsChild(hWnd, hWndAtPt)) {return false;}}// 所有采样点都被其他窗口覆盖return true;
}