目录
[3、定义C++进程交互的句柄 及给C++进程发送的消息ID](#3、定义C++进程交互的句柄 及给C++进程发送的消息ID)
一、两种不同程序写的进程交互
1、定义交互消息
cs
public const int WM_COPYDATA = 0x004A;
public const int CSIDL_APPDATA = 0x001a;2、定义C++进程发来的消息ID
cs
public const int SubExe_EXIT = 1; //退出子进程
public const int SubExe_Show = 2;
public const int SubExe_Hide = 3;
public const int SubExe_SendInfo = -1;3、定义C++进程交互的句柄 及给C++进程发送的消息ID
cs
public int m_hxnwHWND = 0;
public const int ToXnwInfo = 200; //给C++进程发送 4、定义交互消息所需的数据类型
cs
struct COPYDATASTRUCT
{
public IntPtr dwData; // Any value the sender chooses. Perhaps its main window handle?
public int cbData; // The count of bytes in the message.
public IntPtr lpData; // The address of the message.
}
public struct COPY_DATA
{
public IntPtr dwData;
public int cbData;
[MarshalAs(UnmanagedType.LPStr)]
public string lpData;
}5、引入所需的系统函数
cs
[DllImport("kernel32.dll")]
static extern bool WritePrivateProfileString(string lpAppName, string lpKeyName,
string lpString, string lpPath);
[DllImport("kernel32.dll")]
private static extern int GetPrivateProfileString(string section, string key, string def, StringBuilder retVal, int size, string filePath);
[DllImport("user32.dll")]
public static extern int SendMessage(IntPtr hWnd, int wMsg, IntPtr wParam, IntPtr lParam);
[DllImport("shell32.dll")]
static extern int SHGetFolderPath(IntPtr hwndOwner, int nFolder, IntPtr hToken, uint dwFlags, [Out] StringBuilder pszPath);6、给主进程发消息
cs
public static void SendXnwMessage(int hWnd, string message)
{
IntPtr lpData = Marshal.StringToHGlobalAnsi(message);
COPYDATASTRUCT data = new COPYDATASTRUCT();
data.dwData = (IntPtr)ToXnwInfo;
data.cbData = message.Length + 1;
data.lpData = lpData;
IntPtr lpStruct = Marshal.AllocHGlobal(Marshal.SizeOf(data));
Marshal.StructureToPtr(data, lpStruct, false);
IntPtr nWp = IntPtr.Zero;
SendMessage((IntPtr)hWnd, WM_COPYDATA, nWp, lpStruct);
}7、写入本进程主窗口句柄
cs
public void WriteHwnd(IntPtr hwnd)
{
const int MaxPath = 260;
StringBuilder builder = new StringBuilder(MaxPath);
SHGetFolderPath(IntPtr.Zero, (int)CSIDL_APPDATA, IntPtr.Zero, 0x0000, builder);
string path = builder.ToString() + "\\kuaileketang";
Directory.CreateDirectory(path);
path += "\\hWnd.ini";
string text = String.Format("{0}", hwnd);
WritePrivateProfileString("Wnd", "hWnd", text, path);
读取校内外窗口句柄
StringBuilder temp = new StringBuilder(256);
int i = GetPrivateProfileString("Wnd", "hParent", "0", temp, 256, path);
string xnwHwndStr = temp.ToString();
m_hxnwHWND = int.Parse(xnwHwndStr);
if (true)
SendXnwMessage(m_hxnwHWND, ""); //若有环境，则发送空信息
else
SendXnwMessage(m_hxnwHWND, "www.biying.com"); //若没有环境，则发送下载该环境所需的网址
}8、处理发来的交互消息
cs
public void onCopyData(int msg, IntPtr wParam, IntPtr lParam)
{
if (msg == WM_COPYDATA)
{
COPY_DATA copyData = (COPY_DATA)Marshal.PtrToStructure(lParam, typeof(COPY_DATA));
if (null != copyData.lpData)
{
int id = (int)copyData.dwData;
string jstr = copyData.lpData;
switch(id)
{
case SubExe_EXIT:
{
UnsetHotkey();
trayIcon.Dispose();
Application.Exit();
}
break;
}
}
}
}