Win32中TreeView控件的使用方法，类似于资源管理器中文件树形显示方式

首先是头文件，内容如下：

#include <tchar.h>
#include "..\CommonFiles\CmnHdr.h"
#include <Windows.h>
#include <WindowsX.h>
#include <CommCtrl.h>
#include "resource.h"

#pragma comment (lib,"comctl32.lib")

BOOL InitTreeViewImageLists(HWND hwndTV); //该函数主要用于向TreeView控件中添加图片

HTREEITEM InitTreeCtrl(HWND hwnd,PTSTR pszCaption,int nLevel);//该函数向TreeView控件中添加内容

以下是实现函数：

#include "InitCtrls.h"

extern HINSTANCE g_hInst;
extern int g_nOpen;
extern int g_nClose;
BOOL InitTreeViewImageLists(HWND hwndTV){

    HIMAGELIST  himl;
    HBITMAP hBitmap;
    HICON hIcon;
    if((himl = ImageList_Create(16,16,FALSE,ILC_COLOR,0))==NULL)
        return FALSE;

    hBitmap = LoadBitmap(g_hInst,MAKEINTRESOURCE(IDB_BITMAP1));
    hIcon = LoadIcon(g_hInst,MAKEINTRESOURCE(IDI_ICON1));
    //g_nOpen = ImageList_Add(himl,hBitmap,(HBITMAP)NULL);
    //开始我用的是上面的方法，但不知道为什么添加不上，返回值-1
    g_nOpen = ImageList_AddIcon(himl,hIcon);

    DeleteObject(hIcon);

    hBitmap = LoadBitmap(g_hInst,MAKEINTRESOURCE(IDB_BITMAP2));
    hIcon = LoadIcon(g_hInst,MAKEINTRESOURCE(IDI_ICON2));
    g_nClose = ImageList_AddIcon(himl,hIcon);
    DeleteObject(hIcon);

    if(ImageList_GetImageCount(himl) < 2)
        return FALSE;
    TreeView_SetImageList(GetDlgItem(GetParent(hwndTV),IDC_TREE),himl,TVSIL_NORMAL);

    return TRUE;    
}


HTREEITEM InitTreeCtrl(HWND hwnd,PTSTR pszCaption,int nLevel){
    HWND hwndTreeCtrl = GetDlgItem(hwnd,IDC_TREE);
    TVITEM tvi;
    TVINSERTSTRUCT tvins;
    static HTREEITEM hPrev = (HTREEITEM)TVI_FIRST;//hPrev 代表当前加入的新项
    static HTREEITEM hPrevRootItem = NULL; //前一级目录
    static HTREEITEM hPrevLev2Item = NULL;
    HTREEITEM hti ;

    tvi.mask = TVIF_TEXT|TVIF_IMAGE|TVIF_SELECTEDIMAGE|TVIF_PARAM;

    tvi.pszText = pszCaption;
    tvi.cchTextMax = sizeof(pszCaption)/sizeof(pszCaption[0]);

    tvins.item = tvi;
    tvins.hInsertAfter = hPrev;

    if(nLevel == 1)
        tvins.hParent = TVI_ROOT;
    else if(nLevel == 2)
        tvins.hParent = hPrevRootItem;
    else 
        tvins.hParent = hPrevLev2Item;

    hPrev = TreeView_InsertItem(hwndTreeCtrl,&tvins);

    if(nLevel == 1)
        hPrevRootItem = hPrev;
    else 
        hPrevLev2Item = hPrev;

    if(nLevel > 1){
        hti = TreeView_GetParent(hwndTreeCtrl,hPrev);
        tvi.mask = TVIF_IMAGE | TVIF_SELECTEDIMAGE;
        tvi.hItem = hti;
        tvi.iImage = g_nOpen;
        tvi.iSelectedImage = g_nOpen;

        TreeView_SetItem(hwndTreeCtrl,&tvi);
    }
    return hPrev;
}