Question

VB 获取指定窗口标题和句柄

用FindWindow 时要使用到窗口的标题，但是因为每次要获取的窗口不一样，标题肯定也不一样，所以想知道，用VB能写一个获取指定窗口的标题么？

本人的想法是用VB的command1_click 利用shell打开一个文件，如何能自动获得这个文件的句柄？？
请教。
谢谢了！！！
答案追+30

Answer 1

'创建一个列表框和一个按钮
'api函数定义
private
declare
function
getwindowtext
lib
"user32"
alias
"getwindowtexta"
(byval
hwnd
as
long,
byval
lpstring
as
string,
byval
cch
as
long)
as
long
private
declare
function
showwindow
lib
"user32"
(byval
hwnd
as
long,
byval
ncmdshow
as
long)
as
long
private
declare
function
getwindow
lib
"user32"
(byval
hwnd
as
long,
byval
wcmd
as
long)
as
long
private
declare
function
getclassname
lib
"user32"
alias
"getclassnamea"
(byval
hwnd
as
long,
byval
lpclassname
as
string,
byval
nmaxcount
as
long)
as
long
const
gw_hwndfirst
=
0
const
gw_hwndnext
=
2
private
sub
command1_click()
dim
s
as
long
dim
a
as
string
a
=
space(255)
s
=
getwindow(me.hwnd,
gw_hwndfirst)
'获得句柄
getwindowtext
s,
a,
255
'获得标题
dim
ab
as
string
*
255
getclassname
s,
ab,
255
'获得类名
dim
classname
as
string
classname
=
stripterflag(ab)
'stripterflag是一个自定义函数,后面有代码,用于去处结束符
if
ucase(classname)
=
"notepad"
then
list1.additem
a
list1.itemdata(list1.listcount
-
1)
=
s
end
if
do
while
s
doevents
s
=
getwindow(s,
gw_hwndnext)
'获得句柄
getwindowtext
s,
a,
255
'获得标题
getclassname
s,
ab,
255
'获得类名
classname
=
stripterflag(ab)
if
ucase(classname)
=
"notepad"
then
list1.additem
a
list1.itemdata(list1.listcount
-
1)
=
s
end
if
loop
end
sub
private
sub
list1_click()
msgbox
list1.itemdata(list1.listindex)
'单击列表框获得句柄
end
sub

Answer 2

shell()这是调用函数可调用DOS

Answer 3

较难。

Answer 4

Declare Function ShellExecute Lib "shell32.dll" Alias "ShellExecuteA" (ByVal hwnd As Long, ByVal lpOperation As String, ByVal lpFile As String, ByVal lpParameters As String, ByVal lpDirectory As String, ByVal nShowCmd As Long) As Long
说明
查找与指定文件关联在一起的程序的文件名
返回值
Long，非零表示成功，零表示失败。会设置GetLastError
参数表
参数 类型及说明
hwnd Long，指定一个窗口的句柄，有时候，windows程序有必要在创建自己的主窗口前显示一个消息框
lpOperation String，指定字串“open”来打开lpFlie文档，或指定“Print”来打印它
lpFile String，想用关联程序打印或打开一个程序名或文件名
lpParameters String，如lpszFlie是可执行文件，则这个字串包含传递给执行程序的参数
lpDirectory String，想使用的完整路径
nShowCmd Long，定义了如何显示启动程序的常数值。参考ShowWindow函数的nCmdShow参数