获取进程/主窗口的句柄
通过Process的MainWindowHandle的方式不一定获取到到句柄，因此我们需要结束Win32的Api来来获取
Win32的Api中有EnumWindows可以枚举中所有的窗体，通过继承id和进程名的方式进行匹配，便可以获取到指定的进程的主窗体的句柄
具体的代码如下：
///
/// 枚举窗体的回调
///
///
///
///
public delegate bool EnumWindowsCallBack(IntPtr hwnd, IntPtr lParam);
///
/// 枚举出窗体
///
///
///
///
[DllImport("user32")]
public static extern int EnumWindows(EnumWindowsCallBack x, IntPtr y);
///
/// 获取窗体的名称
///
///
///
///
///
[DllImport("user32.dll")]
public static extern int GetWindowTextW(IntPtr hWnd, [MarshalAs(UnmanagedType.LPWStr)] StringBuilder lpString, int nMaxCount);
[DllImport("User32.dll", CharSet = CharSet.Auto)]
public static extern int GetWindowThreadProcessId(IntPtr hwnd, out int ID);
///
/// 枚举方式获取句柄
///
///
public static IntPtr EnumWindows(Process process)
{
IntPtr msgPtr = Marshal.StringToHGlobalAnsi(_processName + "^" + process.Id);
IntPtr handle=IntPtr.Zero;
EnumWindows(new EnumWindowsCallBack((hwnd, lpam) =>
{
var msgs = (Marshal.PtrToStringAnsi(lpam)).Split('^');
if (msgs.Length < 2) return false;//停止枚举
string msg = msgs[0];
var lpid = int.Parse(msgs[1]);
StringBuilder sb = new StringBuilder(256);
GetWindowTextW(hwnd, sb, sb.Capacity);
GetWindowThreadProcessId(hwnd, out int pid);
if (sb != null && sb.ToString().Equals(msg) && pid == lpid)
{
handle= hwnd;
return false; //停止枚举
}
return true;//继续枚举
}), msgPtr);
return handle;
}
通过以上的方式，便可以获取我们想要的进程的主窗体句柄了