1樓：
declare function getwindowtext lib "user32" alias "getwindowtexta" _
(byval hwnd as long, byval lpstring as string, _
byval cch as long) as long
dim wintitlebuf as string * 255
getwindowtext(lhwnd, wintitlebuf, 255)
wintitlebuf=left( wintitlebuf,instr(1, wintitlebuf,chr(0))-1)
ps：用enumchirldwindow 函式列舉 得到主窗體的所有子視窗（控制元件）的hwnd，就可以用getwindowtext得到內容。但是窗體上的標籤是找不到的……
2樓：匿名使用者
窗體上的文字，實際上在該窗體上的子窗體（就是窗體上的控制元件，如標籤控制元件，按鈕控制元件等）上的文字，你必須列舉該窗體下的子窗體後，再用getwindowtext獲取內容。
vb 獲取視窗上多個控制元件的控制代碼,如何知道哪個是自己想要的?
3樓：匿名使用者
這個可能是你想要的東東吧！
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vb 遍歷視窗所有子窗體控制代碼
private const gw_child = 5
private const gw_hwndfirst = 0
private const gw_hwndnext = 2
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 getwindowtextlength lib "user32" alias "getwindowtextlengtha" (byval hwnd as long) as long
private declare function iswindow lib "user32" (byval hwnd 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
private declare function getwindow lib "user32" (byval hwnd as long, byval wcmd as long) as long
private sub fillchild(hwndparent as long)
dim hwndchild as long
dim szcaption as string
dim buffer as string
dim i as long
hwndchild = getwindow(hwndparent, gw_child)
if (hwndchild = 0) then exit sub
hwndchild = getwindow(hwndchild, gw_hwndfirst)
if hwndchild = 0 then exit sub
while (hwndchild <> 0)
szcaption = string$(255, 0)
getclassname hwndchild, szcaption, 250
szcaption = left$(szcaption, instr(szcaption, string$(1, 0)) - 1)
buffer = cstr(hwndchild) & "--" & szcaption
i = getwindowtextlength(hwndchild)
szcaption = string$(255, 0)
getwindowtext hwndchild, szcaption, 250
szcaption = left$(szcaption, i)
buffer = buffer & "--" & szcaption
list1.additem buffer
fillchild hwndchild
hwndchild = getwindow(hwndchild, gw_hwndnext)
wend
end sub
private sub getchildwindow(hwnd as long)
dim szcaption as string
dim buffer as string
dim i as long
list1.clear
szcaption = string$(255, 0)
getclassname hwnd, szcaption, 250
szcaption = left$(szcaption, instr(szcaption, string$(1, 0)) - 1)
buffer = cstr(hwnd)
buffer = buffer & "--" & szcaption
i = getwindowtextlength(hwnd)
szcaption = string$(255, 0)
getwindowtext hwnd, szcaption, 250
szcaption = left$(szcaption, i)
buffer = buffer & "--" & szcaption
list1.additem buffer
fillchild hwnd
end sub
呼叫方法
getchildwindow hwnd'hwnd是指定的視窗控制代碼
結果以窗體控制代碼--窗體類名稱--窗體text
形式列在列表框list1中
vb api如何獲取視窗內控制元件的控制代碼（急急急！）
4樓：匿名使用者
private declare function windowfrompoint lib "user32" (byval xpoint as long, byval ypoint as long) as long
private declare function getcursorpos lib "user32" (lppoint as pointapi) as long
private declare function getwindowtext lib "user32" alias "getwindowtexta" (byval hwnd as long, byval lpstring as string, byval cch as long) as long
private type pointapi
x as long
y as long
end type
dim n as pointapi
dim a as long
private sub form_load()
timer1.interval = 100
label1.caption = "移動滑鼠指標"
end sub
private sub timer1_timer()
getcursorpos n
a = windowfrompoint(n.x, n.y)
if a <> 0 then
dim s as string
s = string(100, chr(0))
getwindowtext a, s, 100
label1.caption = "目標標題或文字: " & trim(s)
label2.caption = "目標控制代碼為 " & a
end if
end sub
5樓：
用這個 api 宣告：
private declare function getdlgitem lib "user32" alias "getdlgitem" (byval hdlg as long, byval niddlgitem as long) as long
然後，dim hwnd as long
hwnd = getdlgitem ( hdlg , niddlgitem )
hdlg是視窗的控制代碼，niddlgitem是hdlg視窗內的控制元件的id號，返回值hwnd就是控制元件的控制代碼。
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