请问aos如何使用富文本框，以及文本框内可以上传图片

在控件上有个鼠标单击的消息..

用响应消息做判断右键显示一个菜单,菜单对应“剪切”“复制”“粘贴”“全选” *** 作,在每个菜单选项对应芹胡一个 *** 作,这些誉首兆 *** 作获取当前文庆租本框的状态

您好！设置文本框datafield和datasource属性，datasource是指猛闹罩定数据控件绑定数据，如data控件，datafield属性是让文本框显示datasource是指定数据库文件的字段内容

举例：ta.mdb是c盘下的一个数据库文件，有一个表名stu，有两个字段名，序号和姓名。

在工程窗枝闹口中画一个data控件，和两个文本框，将data控件的databasename属性指定为c:\ta.mdb，recordsource属性设置为数据库表的名字，将文本框的datasource属性弯唤选中为data1控件，datafield属性分别选中序号和姓名，运行就能看到效果注：以上是最简单的例子，可以有复杂点的用adodc控件+sql语句

富文本框和文本框一样,每次输入文字都会有刷新动作,每次刷新之后,你所绘制的野桥图片也就没了.所以需要每次文字输入都重新绘制背景.

这里有个设置文本框背景的代码,希望对你有所帮助:

------------------------------------------窗口的代码-------------------

窗体：form1

图片框 picture1

文本框 text1

Private Sub Form_Load()

Set pic = LoadResPicture(102, 0)

Set Picture1.Picture = pic

Dim hdc As Long

hdc = GetDC(Text1.hwnd) '建立一个临时DC

memDc = CreateCompatibleDC(hdc)

MemBitmap = CreateCompatibleBitmap(hdc, Text1.Width, Text1.Height)

SelectObject memDc, MemBitmap

StretchBlt memDc, 0, 0, Text1.Width, Text1.Height, Picture1.hdc, 0, 0, Text1.Width, Text1.Height, SRCCOPY

ReleaseDC Text1.hwnd, hdc

If memDc = 0 Or MemBitmap = 0 Then

MsgBox "error create dc"

End

End If

Oldproc = SetWindowLong(Text1.hwnd, GWL_WNDPROC, AddressOf winproc)

OldWndProc = SetWindowLong(Me.hwnd, GWL_WNDPROC, AddressOf winproc1)

End Sub

Private Sub Form_Unload(Cancel As Integer)

DeleteObject MemBitmap

DeleteDC memDc

SetWindowLong Me.hwnd, GWL_WNDPROC, OldWndProc

SetWindowLong Text1.hwnd, GWL_WNDPROC, Oldproc

End Sub

Private Sub Text1_DblClick()

SendMessage Text1.hwnd, WM_PAINT, 0, 0

End Sub

Private Sub Text1_MouseDown(Button As Integer, Shift As Integer, x As Single, y As Single)

SendMessage Text1.hwnd, WM_PAINT, 0, 0

End Sub

Private Sub Text1_MouseMove(Button As Integer, Shift As Integer, x As Single, y As Single)

'选定文本的时候如果文本选顶发生了变化闭御，则通知更

Static Startpos0 As Long, Endpos0 As Long

Dim Startpos As Long, Endpos As Long

If Button = 1 Then

Dim v As Long

v = SendMessage(Text1.hwnd, EM_GETSEL, 0, 0)

Endpos = v \ 65536: Startpos = v Mod 65536 '-->获得选定文本位置

If Startpos <>Endpos Then '--->发现有选定时候检查选定是否和上次的相同？不同的颂态猛话则重画

If Startpos0 = Startpos And Endpos = Endpos0 Then

Else '---->内容发生变化的时候发送消息请求重画

SendMessage Text1.hwnd, WM_PAINT, 0, 0

Startpos0 = Startpos: Endpos0 = Endpos

End If

End If

End If

End Sub

Private Sub Text1_MouseUp(Button As Integer, Shift As Integer, x As Single, y As Single)

PostMessage Text1.hwnd, WM_PAINT, 0, 0

End Sub

Private Sub Text1_Change()

SendMessage Form1.Text1.hwnd, WM_PAINT, 0, 0

End Sub

--------------------------------------------模块代码-------------------------------------------------

Public Declare Function SetWindowLong Lib "user32" Alias "SetWindowLongA" (ByVal hwnd As Long, ByVal nIndex As Long, ByVal dwNewLong As Long) As Long

Public Declare Function CallWindowProc Lib "user32" Alias "CallWindowProcA" (ByVal lpPrevWndFunc As Long, ByVal hwnd As Long, ByVal msg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Declare Function BitBlt Lib "gdi32" (ByVal hDestDC As Long, ByVal x As Long, ByVal y As Long, ByVal nWidth As Long, ByVal nHeight As Long, ByVal hSrcDC As Long, ByVal xSrc As Long, ByVal ySrc As Long, ByVal dwRop As Long) As Long

Public Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long

Public Declare Function PostMessage Lib "user32" Alias "PostMessageA" (ByVal hwnd As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long

Public Declare Function CreateCompatibleDC Lib "gdi32" (ByVal hdc As Long) As Long

Public Declare Function CreateCompatibleBitmap Lib "gdi32" (ByVal hdc As Long, ByVal nWidth As Long, ByVal nHeight As Long) As Long

Public Declare Function SelectObject Lib "gdi32" (ByVal hdc As Long, ByVal hObject As Long) As Long

Public Declare Function DeleteObject Lib "gdi32" (ByVal hObject As Long) As Long

Public Declare Function DeleteDC Lib "gdi32" (ByVal hdc As Long) As Long

Public Declare Function GetDC Lib "user32" (ByVal hwnd As Long) As Long

Public Declare Function ReleaseDC Lib "user32" (ByVal hwnd As Long, ByVal hdc As Long) As Long

Public Const WM_ERASEBKGND = &H14

Public Const EN_VSCROLL = &H602

Public Const WM_COMMAND = &H111

Public Const EN_HSCROLL = &H601

Public Const EN_CHANGE = &H300

Public Const EN_UPDATE = &H400

Public Const EM_GETSEL = &HB0

Public Const SRCCOPY = &HCC0020 ' (DWORD) dest = source

Public Const SRCAND = &H8800C6 ' (DWORD) dest = source AND dest

Public Const SRCPAINT = &HEE0086 ' (DWORD) dest = source OR dest

Public Const SRCERASE = &H440328 ' (DWORD) dest = source AND (NOT dest )

Public Const EM_SCROLL = &HB5

Public Const GWL_WNDPROC = (-4)

Public Const WM_PAINT = &HF

Public memDc As Long

Public MemBitmap As Long

Public OldWndProc As Long

Public Oldproc As Long

Public pic As Picture

Public Function winproc(ByVal hwnd As Long, ByVal msg As Long, ByVal wp As Long, ByVal lp As Long) As Long

With Form1.Text1

If msg = WM_PAINT Then

Debug.Print Token

Dim hdc As Long

winproc = CallWindowProc(Oldproc, Form1.Text1.hwnd, msg, wp, lp)

If wp = 1 Then .Visible = False: .Visible = True

hdc = GetDC(Form1.Text1.hwnd)

BitBlt hdc, 0, 0, Form1.Text1.Width, Form1.Text1.Height, memDc, 0, 0, SRCAND

ReleaseDC Form1.Text1.hwnd, hdc

Exit Function

End If

winproc = CallWindowProc(Oldproc, Form1.Text1.hwnd, msg, wp, lp)

End With

End Function

Public Function winproc1(ByVal hwnd As Long, ByVal msg As Long, ByVal wp As Long, ByVal lp As Long) As Long

If msg = WM_COMMAND Then

Select Case wp \ 65536

Case EN_VSCROLL '---->获得文本框纵向滚动消息

SendMessage Form1.Text1.hwnd, WM_PAINT, 1, 0

Case EN_HSCROLL '----->获得横向滚动消息

SendMessage Form1.Text1.hwnd, WM_PAINT, 1, 0

Case EN_UPDATE

SendMessage Form1.Text1.hwnd, WM_PAINT, 0, 0

End Select

End If

winproc1 = CallWindowProc(OldWndProc, hwnd, msg, wp, lp)

End Function

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