树视图控件中的每个项都可以有两个与之关联的图像。 项目在选中时显示一个图像，另一个图像在未选中时显示。 若要包含具有树视图项的图像，请先使用 图像列表 函数创建图像列表并向其添加图像。 然后使用 TVM_SETIMAGELIST 消息将图像列表与树视图控件相关联。
需要了解的内容
技术
先决条件
- C/C++
- Windows 用户界面编程
说明书
初始化映像列表
以下示例创建图像列表，向列表中添加三个位图，并将图像列表与树视图控件相关联。
// InitTreeViewImageLists - creates an image list, adds three bitmaps
// to it, and associates the image list with a tree-view control.
// Returns TRUE if successful, or FALSE otherwise.
// hwndTV - handle to the tree-view control.
//
// Global variables and constants:
// g_hInst - the global instance handle.
// g_nOpen, g_nClosed, and g_nDocument - global indexes of the images.
// CX_BITMAP and CY_BITMAP - width and height of an icon.
// NUM_BITMAPS - number of bitmaps to add to the image list.
// IDB_OPEN_FILE, IDB_CLOSED_FILE, IDB_DOCUMENT -
// resource identifiers of the bitmaps.
BOOL InitTreeViewImageLists(HWND hwndTV)
{
HIMAGELIST himl; // handle to image list
HBITMAP hbmp; // handle to bitmap
// Create the image list.
if ((himl = ImageList_Create(CX_BITMAP,
CY_BITMAP,
FALSE,
NUM_BITMAPS, 0)) == NULL)
return FALSE;
// Add the open file, closed file, and document bitmaps.
hbmp = LoadBitmap(g_hInst, MAKEINTRESOURCE(IDB_OPEN_FILE));
g_nOpen = ImageList_Add(himl, hbmp, (HBITMAP)NULL);
DeleteObject(hbmp);
hbmp = LoadBitmap(g_hInst, MAKEINTRESOURCE(IDB_CLOSED_FILE));
g_nClosed = ImageList_Add(himl, hbmp, (HBITMAP)NULL);
DeleteObject(hbmp);
hbmp = LoadBitmap(g_hInst, MAKEINTRESOURCE(IDB_DOCUMENT));
g_nDocument = ImageList_Add(himl, hbmp, (HBITMAP)NULL);
DeleteObject(hbmp);
// Fail if not all of the images were added.
if (ImageList_GetImageCount(himl) < 3)
return FALSE;
// Associate the image list with the tree-view control.
TreeView_SetImageList(hwndTV, himl, TVSIL_NORMAL);
return TRUE;
}