1. GetWindowText
2. SendMessage
//剛剛發現，這個有問題。
//無法成功。。。，不知為什么
//3. DispatchMessage
//MSG msg;
//msg.hwnd = hedit;
//msg.message = WM_GETTEXT;
//msg.wParam = (WPARAM)cchTextMax;
//msg.lParam = (LPARAM)lpszText;
//DispatchMessage(&msg);
4.GetWindowLong
LONG lWndProc;
if (NULL != (lWndProc = GetWindowLong(hedit, GWL_WNDPROC)))
CallWindowProc((WNDPROC)lWndProc, hedit, WM_GETTEXT, (WPARAM)cchTextMax, (LPARAM)lpszText);
6.GetClassInfo、GetClassInfoEx(兩者有部分差異)
//GetClassInfo
WNDCLASS wc;
GetClassInfo(hInstance, "EDIT", &wc);
CallWindowProc(wc.lpfnWndProc, hedit, WM_GETTEXT, (WPARAM)cchTextMax, (LPARAM)lpszText);
//GetClassInfoEx 參看 GetClassInfo
6.自己寫 EDIT 窗口文本獲取的處理過程
可以從 windows 的源碼中發現, 我在 editec.c 和 edecrare.c 中摘的，詳細情況自己看吧 ^_^
case WM_GETTEXT:
/*
* wParam - max number of _bytes_ (not characters) to copy
* lParam - buffer to copy text to. Text is 0 terminated.
*/
lreturn = (LONG)ECGetText(ped, wParam, (LPSTR)lParam, TRUE);
break;
/////////////////////////////////////////////////////////////////////////////
/***************************************************************************\[!--empirenews.page--]
* ECGetText AorW
*
* Copies at most maxCchToCopy chars to the buffer lpBuffer. Returns
* how many chars were actually copied. Null terminates the string based
* on the fNullTerminate flag:
* fNullTerminate --> at most (maxCchToCopy - 1) characters will be copied
* !fNullTerminate --> at most (maxCchToCopy) characters will be copied
*
* History:
\***************************************************************************/
ICH ECGetText(
PED ped,
ICH maxCchToCopy,
LPSTR lpBuffer,
BOOL fNullTerminate)
{
PSTR pText;
if (maxCchToCopy) {
/*
* Zero terminator takes the extra byte
*/
if (fNullTerminate)
maxCchToCopy--;
maxCchToCopy = min(maxCchToCopy, ped->cch);
/*
* Zero terminate the string
*/
if (ped->fAnsi)
*(LPSTR)(lpBuffer + maxCchToCopy) = 0;
else
*(((LPWSTR)lpBuffer) + maxCchToCopy) = 0;
pText = ECLock(ped);
RtlCopyMemory(lpBuffer, pText, maxCchToCopy*ped->cbChar);
ECUnlock(ped);
}
return maxCchToCopy;
}
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