请问如何获取桌面listview的句柄

[Ayalyc]

偶是一个vc的新手,正在拜读侯大师的"mfc深入浅出",应同学的要求,编一个小程序,主要是为了去除桌面上图标下文字的背景色,要知道在有墙纸时,那颜色挺烦人的.
偶根据查到的一点资料和msdn,知道要获取桌面listview的句柄.但是怎样获取这个handle呢?
偶已经写了一点了,如下:


HWND hWnd=GetDesktopWindow();
ListView_SetTextBkColor(hWnd,CLR_NONE);
int iCount=ListView_GetItemCount(hWnd);
ListView_RedrawItems(hWnd,0,(iCount-1));
UpdateWindow(hWnd);


偶知道要获取的是桌面listview的handle,而不是桌面的句柄,but how?
偶还不知道窗口刷新是什么东西,上面的东西是照msdn抄的,不知有没有错,请指正.
ps.偶在vc中debug,第二步hWnd的值就变成了0x00000080,偶不行了,help.

[hcphcp]

这个hWnd是桌面的句柄，不是桌面内部的ListView子窗体的句柄，有下面这个API
FindWindowEx(HWND hWndParent,HWND hWndChildAfter,LPCTSTR lpszClass,LPCTSTR lpszWindow)
这样调用FindWindowEx(NULL,NULL,"SysListView32",NULL)就可以得到那个ListView的句柄
这几天我的VC坏了没试，，你试试
第一个参数传给NULL代表“桌面”因为winuser.h中定义了
#define HWND_DESKTOP ((HWND)0)
第二个传给NULL代表查找所有的子窗口，
当然用EnumChildWindow也可以，我没试，你试试吧

[hcphcp]

补充一下桌面的子窗口只有一个是属于SysListView32的，所以可以查出来

[Ayalyc]

谢谢小四

[Ayalyc]

我将GetDesktopWindow()更换为FindWindowEx之后,在第二步就出错了,请问为什么

[Ayalyc]

清关注

[xyzboat]

先用spy++看桌面的List的参数，然后Findwindow()，你的参数可能不对

[hcphcp]

楼上好：

我回这个问题时， 用SPY++查过，好象它的句柄在两台机器不一样？

[windoze]

用这个吧，我至今还没发现不能用的情况
HWND hDesktop=FindWindow("Progman", "Program Manager");
if(!hDesktop)
return 0;
HWND hSub=GetDlgItem(hDesktop, 0L);
if(!hSub)
return 0;
hSub=GetDlgItem(hSub, 1L);
// 此时hSub就是桌面ListView的句柄

要注意的是你那段程序在桌面设成Web方式的时候不管用。
最后顺便给你个程序，可以定时把文字背景搞成透明的（你的程序不就是干这个的吗），用MASM编译后长度为2.5K
编译命令：
ml /c /coff transp.asm
link -subsystem:windows -entry:_start -out:transp.exe transp.obj kernel32.lib user32.lib

源程序：

.386
.MODEL flat, stdcall

REFRESH_INTERVAL EQU 10000 ; in millisecons, 10 sec

ERROR_ALREADY_EXISTS EQU 183
LVM_GETTEXTBKCOLOR EQU 1025H
LVM_SETTEXTBKCOLOR EQU 1026H
IDLE_PRIORITY_CLASS EQU 40H
THREAD_PRIORITY_IDLE EQU -15

CreateMutexA PROTO NEAR32 stdcall,
lpMutexAttributes:NEAR32, bInitialOwner:DWORD, lpName:NEAR32

GetLastError PROTO NEAR32 stdcall

GetCurrentProcess PROTO NEAR32 stdcall

GetCurrentThread PROTO NEAR32 stdcall

SetPriorityClass PROTO NEAR32 stdcall,
hProcess:DWORD, dwPriorityClass:DWORD

SetThreadPriority PROTO NEAR32 stdcall,
hProcess:DWORD, dwPriorityClass:DWORD

Sleep PROTO NEAR32 stdcall,
dwMilliseconds:DWORD

FindWindowA PROTO NEAR32 stdcall,
lpClassName:NEAR32, lpWindowName:NEAR32

GetDlgItem PROTO NEAR32 stdcall,
hDlg:DWORD, nCtlID:DWORD

SendMessageA PROTO NEAR32 stdcall,
hWnd:DWORD, uMsg:DWORD, wParam:DWORD, lParam:DWORD

InvalidateRect PROTO NEAR32 stdcall,
hWnd:DWORD, lpRect:NEAR32, bErase:DWORD

ExitProcess PROTO NEAR32 stdcall,
dwExitCode:DWORD

.STACK 1024

.DATA

MutexName DB "TransparentEx", 0
ProgManClass DB "Progman", 0
ProgManWnd DB "Program Manager", 0
hDesktop DD 0

.CODE
_start:
; Create a named mutex to test if there is a previous instance exists
INVOKE CreateMutexA,
0,
1,
NEAR32 PTR MutexName
INVOKE GetLastError
cmp eax, ERROR_ALREADY_EXISTS ; Mutext already created
je exit

; Set process and thread priority
INVOKE GetCurrentProcess
INVOKE SetPriorityClass,
eax,
IDLE_PRIORITY_CLASS
INVOKE GetCurrentThread
INVOKE SetThreadPriority,
eax,
THREAD_PRIORITY_IDLE

dotransparent:
; Find desktop window
INVOKE FindWindowA,
NEAR32 PTR ProgManClass,
NEAR32 PTR ProgManWnd
jz exit
INVOKE GetDlgItem,
eax,
0
jz exit
INVOKE GetDlgItem,
eax,
1
jz exit
mov hDesktop, eax

; Test if icon text is already transparent
INVOKE SendMessageA,
eax,
LVM_GETTEXTBKCOLOR,
0,
0FFFFFFFFH
and eax, 0FF000000H
jnz sleepnow

; If not, set transparent text
INVOKE SendMessageA,
hDesktop,
LVM_SETTEXTBKCOLOR,
0,
0FFFFFFFFH

; Refresh desktop window
INVOKE InvalidateRect,
hDesktop,
0,
1

sleepnow:
; Wait a while(10 sec)
INVOKE Sleep,
REFRESH_INTERVAL

; Repeat
jmp dotransparent

exit:
INVOKE ExitProcess,
0 ; Result code for parent process

PUBLIC _start
END