SDK中如何响应TREEVIEW节点双击事件

[许文君]

BOOL WINAPI Main_Proc(HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam)
{
    switch(uMsg)
    {
        //BEGIN MESSAGE CRACK
        HANDLE_MSG(hWnd, WM_INITDIALOG, Main_OnInitDialog);
        HANDLE_MSG(hWnd, WM_COMMAND, Main_OnCommand);
        HANDLE_MSG(hWnd,WM_CLOSE, Main_OnClose);
        
               case WM_NOTIFY:

请问在哪里响应节点的双击呢，是Main_OnCommand中还是WM_NOTIFY里呢？我定义了这样一个树控件

int i=0;
    for(i;i<=10;i++)
    {
    	
	    	TCHAR x[256];
	    	ZeroMemory(x,sizeof(x)/sizeof(TCHAR));
	    	wsprintf(x,TEXT("第%d项"),i);
	    	inittree(hwnd,x);
    }
void inittree(HWND hwnd,LPCSTR lpcstr)
{
	HWND hwndctrl=GetDlgItem(hwnd,IDC_TRV1);
	HINSTANCE hinst=(HINSTANCE)GetWindowLong(hwnd,GWL_HINSTANCE);
    TVINSERTSTRUCT tvi;
   	tvi.item.mask = TVIF_TEXT | TVIF_IMAGE   
                    |TVIF_SELECTEDIMAGE | TVIF_PARAM; 
	tvi.hInsertAfter = TVI_LAST;
	tvi.hParent = TVI_ROOT;
	tvi.hParent = NULL;
	tvi.item.pszText =(CHAR*) lpcstr;
    TreeView_InsertItem(hwndctrl,&tvi);
}

我想要的是双击某节点，MESSAGEBOX出它的item.pszText ，请问该如何实现呢？我是个新手，看不懂MFC的- -求求大家帮忙给我写下吧，万分感谢。

[许文君]

说的我仍然云里雾里，不好意思，我太笨，能给我个例子代码怎么响应么。

[蒋晟]

Default Tree-View Control Message Processing

WM_LBUTTONDBLCLK Cancels label editing and, if an item was double-clicked, sends the NM_DBLCLK (tree view) notification message to the parent window. If the parent window returns 0, the tree-view control toggles the expanded state of the item, sending the parent window the TVN_ITEMEXPANDING and TVN_ITEMEXPANDED notification messages. There is no return value.

[许文君]

我把代码写成这样，但是双击就崩溃，能说下原因么

        case WM_NOTIFY:
	    {        
	           if (wParam == IDC_TRV1)
	            {
	                NM_TREEVIEW* phdr = (NM_TREEVIEW*)lParam;
			       if(phdr->hdr.code == NM_DBLCLK)
				    {
					     HWND hTree = GetDlgItem(hWnd, IDC_TRV1);
					     TCHAR str[256];
					     TVITEM FAR* pitem;
					     TreeView_GetItem(hTree, pitem);
					     lstrcpy(str, pitem->pszText);
					     MessageBox(hWnd, str, "", MB_OK);
	                } 
	             }
      }break;

[蒋晟]

IDC_TRV1？用phdr->hdr.idfrom判断
VITEM FAR* pitem;
TreeView_GetItem(hTree, pitem);
这两句肯定会崩溃，pitem使用之前没有分配空间

[许文君]

参照您说的，在代码中加入了

       TCHAR cBuf[100];
       ZeroMemory(cBuf,sizeof(cBuf)/sizeof(TCHAR));  
       pitem->pszText = cBuf; 

MESSAGEBOX能出来了，可是MessageBox(hWnd, cBuf, "", MB_OK); cBuf却没喝想的那样弹出第多少项。

[许文君]

已实现，非常感谢您