Question

更改整个richtextbox的背景颜色很简单，但不是单个单词或字符，是否有API或用户控件正好这样做。我尝试将单词doc保存为rtf并复制该项并将其粘贴在富文本框中，但它工作正常，但效果不好，怎么办呢。很难或很容易！

Answer 1

我曾经需要在RichTextBox中为一个VB6项目突出显示文本...我使用了以下模块（不是我写的）

<强>模块：

Option Explicit

Public Const LF_FACESIZE = 32
Public Const WM_USER = &H400
Public Const EM_SETCHARFORMAT = (WM_USER + 68)
Public Const CFM_BACKCOLOR = &H4000000
Public Const SCF_SELECTION = &H1

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 Type CHARFORMAT2
    cbSize As Integer    '2
    wPad1 As Integer    '4
    dwMask As Long    '8
    dwEffects As Long    '12
    yHeight As Long    '16
    yOffset As Long    '20
    crTextColor As Long    '24
    bCharSet As Byte    '25
    bPitchAndFamily As Byte    '26
    szFaceName(0 To LF_FACESIZE - 1) As Byte    ' 58
    wPad2 As Integer    ' 60

' Additional stuff supported by RICHEDIT20
    wWeight As Integer    ' /* Font weight (LOGFONT value)      */
    sSpacing As Integer    ' /* Amount to space between letters  */
    crBackColor As Long    ' /* Background color                 */
    lLCID As Long    ' /* Locale ID                        */
    dwReserved As Long    ' /* Reserved. Must be 0              */
    sStyle As Integer    ' /* Style handle                     */
    wKerning As Integer    ' /* Twip size above which to kern char pair*/
    bUnderlineType As Byte    ' /* Underline type                   */
    bAnimation As Byte    ' /* Animated text like marching ants */
    bRevAuthor As Byte    ' /* Revision author index            */
    bReserved1 As Byte
End Type

拨打：

以黄色突出显示所选文字

Dim RTFformat As CHARFORMAT2 With RTFformat .cbSize = Len(RTFformat) .dwMask = CFM_BACKCOLOR .crBackColor = vbYellow End With SendMessage RichTextBox1.hwnd, EM_SETCHARFORMAT, SCF_SELECTION, RTFformat

希望这会有所帮助：）

在richtextbox中更改单词的背景颜色

1 个答案: