C# API 应用(跨进程控制别的窗体的TreeView节点的展开与点击)

class API
{
#region "API函数定义 "
[DllImport( "user32.dll ", CharSet = CharSet.Unicode)]
private static extern int SendMessage(int hWnd, int msg, IntPtr wParam, IntPtr lparam);
[DllImport( "user32.dll ", CharSet = CharSet.Unicode)]
private static extern int SendMessage(int hWnd, int msg, IntPtr wParam, TVITEM lparam);
[DllImport( "user32.dll ")]
public static extern int GetWindowText(int hWnd, StringBuilder lpString, int nMaxCount);
[DllImport( "user32.dll ")]
public static extern int EnumChildWindows(int hWndParent, MyCallBack lpfn, StringBuilder value);
[DllImport( "user32.dll ")]
public static extern int GetClassNameA(int hwnd, StringBuilder lpClassName, int nMaxCount);
[DllImport( "kernel32 ", CharSet = CharSet.Unicode)]
public static extern int CopyMemory(StringBuilder Destination, IntPtr Source, int Length);
[DllImport( "kernel32 ", CharSet = CharSet.Unicode)]
public static extern int GlobalAlloc(int wFlags, int dwBytes);
[DllImport( "kernel32 ", CharSet = CharSet.Unicode)]
public static extern int GlobalFree(IntPtr hMem);
#endregion

#region "常量定义 "
private const int TVGN_CARET = 0x00000009;
private const int TVM_SELECTITEM = 0x0000110b;
private const int TVGN_ROOT = 0x00000000;
private const int TVM_GETNEXTITEM = 0x0000110a;
private const int TVIF_TEXT = 0x0001;
private const int TVGN_NEXT = 0x00000001;
private const int TVM_GETITEM = 0x0000110c;
private const int TVGN_CHILD = 0x00000004;
private const int GMEM_FIXED = 0x0000;
#endregion
/// <summary>
/// 选取TreeView指定项
/// </summary>
/// <param name= "TreeViewHwnd "> 树对象句柄 </param>
/// <param name= "ItemHwnd "> 节点对象句柄 </param>
/// <returns> 成功选中返回true 没找到返回false </returns>
public static bool SelectNode(IntPtr TreeViewHwnd, IntPtr ItemHwnd)
{
int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_SELECTITEM, new IntPtr(TVGN_CARET), ItemHwnd);
if (result == 0)
{
return false;
}
else
{
return true;
}
}
/// <summary>
/// 获取TreeView根节点
/// </summary>
/// <param name= "TreeViewHwnd "> 树对象句柄 </param>
/// <returns> 成功返回根节点句柄 否则返回 0 </returns>
public static IntPtr GetRoot(IntPtr TreeViewHwnd)
{
TVITEM tv = new TVITEM();
IntPtr hStr = Marshal.AllocHGlobal(1024);
tv.hItem = TreeViewHwnd;
tv.mask = TVIF_TEXT;
tv.pszText = hStr;
tv.cchTextMax = 1024;
int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_ROOT), tv);
Marshal.FreeHGlobal(hStr);
return new IntPtr(result);
}
/// <summary>
/// 获取同级下一节点句柄
/// </summary>
/// <param name= "TreeViewHwnd "> 树对象句柄 </param>
/// <param name= "PrevHwnd "> 上一项节点句柄 </param>
/// <returns> 成功返回下一项节点句柄 否则返回 0 </returns>
public static IntPtr GetNextItem(IntPtr TreeViewHwnd, IntPtr PrevHwnd)
{
int mbHwnd = 0;
mbHwnd = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_NEXT), PrevHwnd);
return new IntPtr(mbHwnd);
}
/// <summary>
/// 获取第一个子节点句柄
/// </summary>
/// <param name= "TreeViewHwnd "> 树对象句柄 </param>
/// <param name= "ParentHwnd "> 父节点句柄 </param>
/// <returns> 成功返回第一个子节点句柄 否则返回 0 </returns>
public static IntPtr GetFirstChildItem(IntPtr TreeViewHwnd, IntPtr ParentHwnd)
{
int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETNEXTITEM, new IntPtr(TVGN_CHILD), ParentHwnd);
return new IntPtr(result);
}
/// <summary>
/// 获取指定项文本
/// </summary>
/// <param name= "TreeViewHwnd "> 树对象句柄 </param>
/// <param name= "ItemHwnd "> 节点句柄 </param>
/// <returns> </returns>
public static string GetItemText(IntPtr TreeViewHwnd, IntPtr ItemHwnd)
{
StringBuilder sb = new StringBuilder(1024);
int hStr = GlobalAlloc(GMEM_FIXED, 1024);
if (hStr > 0)
{
TVITEM tv = new TVITEM();
tv.mask = TVIF_TEXT;
tv.HTreeItem = ItemHwnd.ToInt32();
tv.pszText = new IntPtr(hStr);
tv.cchTextMax = 1023;
int i = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETITEM, IntPtr.Zero, tv);
int iCopy = CopyMemory(sb, new IntPtr(hStr), 1024);
GlobalFree(new IntPtr(hStr));
}
return sb.ToString();
}
}
/// <summary>
/// TV_ITEM结构
/// </summary>
[StructLayout(LayoutKind.Sequential, CharSet = CharSet.Auto)]
public class TVITEM
{
public int mask;
public IntPtr hItem;
public int state;
public int stateMask;
public IntPtr pszText;
public int cchTextMax;
public int iImage;
public int iSelectedImage;
public int cChildren;
public IntPtr lParam;
public int HTreeItem;
}

取是可以取得到了
可是取出来的是乱码,唉....

终于解决了

下面是补充上面的取节点文本的

/// <summary>
/// 获取指定项文本
/// </summary>
/// <param name= "TreeViewHwnd "> 树对象句柄 </param>
/// <param name= "ItemHwnd "> 节点句柄 </param>
/// <returns> </returns>
public static string GetItemText(IntPtr TreeViewHwnd, IntPtr ItemHwnd)
{
IntPtr hStr = Marshal.AllocHGlobal(1024);
TVITEM tv = new TVITEM();
tv.hItem = ItemHwnd;
tv.mask = TVIF_TEXT;
tv.pszText = hStr;
tv.cchTextMax = 1024;
StringBuilder sb = new StringBuilder(1024);
int result = SendMessage(TreeViewHwnd.ToInt32(), TVM_GETITEM, new IntPtr(0), tv);
int iCopy = CopyMemory(sb, hStr, 1024);
Marshal.FreeHGlobal(hStr);
return sb.ToString();
}

http://topic.csdn.net/u/20070316/14/c18abdbc-2c7f-4855-9ff2-0f8d5c5fe1a8.html