小妹有问题，关于Svchost进程与桌面交互的代码
在Svchost进程中插入了一个DLL，该DLL是无法使用FindWindow函数找到桌面上某窗口的句柄的。
下面这个代码是我自己写的，希望能开启与桌面的交互，从而使FindWindow能查找到桌面中某窗口的句柄，从而进行SendMessage。但是以下代码执行无效，希望哪位高手能帮忙修改并测试一下下。小妹感激不尽 ^-^
invoke GetProcessWindowStation
.if eax == NULL
ret
.endif
mov hwinstaCurrent,eax
invoke GetCurrentThreadId
invoke GetThreadDesktop,eax
.if eax == NULL
ret
.endif
mov hdeskCurrent,eax
invoke OpenWindowStation,addr szwinsta0,FALSE, WINSTA_ACCESSCLIPBOARD or \
WINSTA_ACCESSGLOBALATOMS or \
WINSTA_CREATEDESKTOP or \
WINSTA_ENUMDESKTOPS or \
WINSTA_ENUMERATE or \
WINSTA_EXITWINDOWS or \
WINSTA_READATTRIBUTES or \
WINSTA_READSCREEN or \
WINSTA_WRITEATTRIBUTES
.if eax == NULL
ret
.endif
mov hwinsta,eax
invoke SetProcessWindowStation,hwinsta
.if eax == NULL
ret
.endif
invoke OpenDesktop,addr szdefault,0,FALSE,DESKTOP_CREATEMENU or DESKTOP_CREATEWINDOW or DESKTOP_ENUMERATE or DESKTOP_HOOKCONTROL or DESKTOP_JOURNALPLAYBACK or\
DESKTOP_JOURNALRECORD or \
DESKTOP_READOBJECTS or \
DESKTOP_SWITCHDESKTOP or \
DESKTOP_WRITEOBJECTS
.if eax == NULL
ret
.endif
mov hdesk,eax
invoke SetThreadDesktop,hdesk
invoke FindWindow,addr szWndClass,addr szWndWindow
.if eax == NULL
ret
.endif
mov hDestWnd,eax
invoke SetProcessWindowStation,hwinstaCurrent
invoke SetThreadDesktop,hdeskCurrent
invoke SendMessage,hDestWnd,WM_WNDH,NULL,NULL
invoke FindWindow,addr szWndClass,addr szWndWindow
.if eax == NULL
ret
.endif
mov hDestWnd,eax
invoke SendMessage,hDestWnd,WM_WNDH,NULL,NULL
invoke CloseWindowStation,hwinsta
invoke CloseDesktop,hdesk
invoke SendMessage,hDestWnd,WM_WNDH,NULL,NULL
[解决办法]
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