原文地址；https://wpf.2000things.com/2013/01/17/736-finding-the-maximum-number-of-touch-points-at-run-time/

我们可以使用Win32的API函数GetSystemMetrics 获取硬件支持的最大触摸点数。

class Program
{[DllImport("user32.dll")]static extern int GetSystemMetrics(int nIndex);// Index passed in to GetSystemMetrics() indicates// what data we're asking for.private const int SM_DIGITIZER = 94;private const int SM_MAXIMUMTOUCHES = 95;// Masks used to check results from SM_DIGITIZER checkprivate const int NID_READY = 0x80;private const int NID_MULTI_INPUT = 0x40;static void Main(string[] args){string info;int digitizer = GetSystemMetrics(SM_DIGITIZER);if ((digitizer & (NID_READY + NID_MULTI_INPUT)) == NID_READY + NID_MULTI_INPUT){int numTouchPoints = GetSystemMetrics(SM_MAXIMUMTOUCHES);info = string.Format("Multitouch ready, {0} inputs supported", numTouchPoints);}elseinfo = "Multitouch not supported";Console.WriteLine(info);Console.ReadLine();}
}

打印出结果如下：

你可以在“控制面板”->“系统”页中查看。