VB6 - Justify text in RichTextBox

[veryjonny]

hi, I was looking for this for sometime, and finally found it.

Though I now search in the forum, then I do find it posted in one two threads. I posted it here in this Code-Bank section, because I think this one is really handy.

Usage:
SetAlignment RichTextBox1.HWND, ercParaJustify

Private Declare Function SendMessageLong Lib "user32" Alias "SendMessageA" (ByVal HWND As Long, ByVal wMsg As Long, ByVal wParam As Long, ByVal lParam As Long) As Long
Private Declare Function SendMessage Lib "user32" Alias "SendMessageA" (ByVal HWND As Long, ByVal wMsg As Long, ByVal wParam As Long, lParam As Any) As Long
Const WM_USER = &H400
Const EM_SETTYPOGRAPHYOPTIONS = WM_USER + 202
Const TO_ADVANCEDTYPOGRAPHY = 1
Const EM_SETPARAFORMAT = WM_USER + 71
Private Const PFA_LEFT = 1
Private Const PFA_RIGHT = 2
Private Const PFA_CENTER = 3
Private Const PFA_JUSTIFY = &H4
Const MAX_TAB_STOPS = 32
Private Type PARAFORMAT2
    cbSize                     As Long
    dwMask                     As Long
    wNumbering                 As Integer
    wEffects                   As Integer
    dxStartIndent              As Long
    dxRightIndent              As Long
    dxOffset                   As Long
    wAlignment                 As Integer
    cTabCount                  As Integer
    rgxTabs(MAX_TAB_STOPS - 1) As Long
    dySpaceBefore              As Long
    dySpaceAfter               As Long
    dyLineSpacing              As Long
    sStyle                     As Integer
    bLineSpacingRule           As Byte
    bOutlineLevel              As Byte
    wShadingWeight             As Integer
    wShadingStyle              As Integer
    wNumberingStart            As Integer
    wNumberingStyle            As Integer
    wNumberingTab              As Integer
    wBorderSpace               As Integer
    wBorderWidth               As Integer
    wBorders                   As Integer
End Type
Public Enum ERECParagraphAlignmentConstants
   ercParaLeft = PFA_LEFT
   ercParaCentre = PFA_CENTER
   ercParaRight = PFA_RIGHT
   ercParaJustify = PFA_JUSTIFY
End Enum
Private Const PFM_ALIGNMENT = &H8&
 
Private Function SetAlignment(lHwnd As Long, ByVal eAlign As ERECParagraphAlignmentConstants)
    Dim tP2 As PARAFORMAT2
    Dim lR As Long
    tP2.dwMask = PFM_ALIGNMENT
    tP2.cbSize = Len(tP2)
    tP2.wAlignment = eAlign
    lR = SendMessageLong(lHwnd, EM_SETTYPOGRAPHYOPTIONS, TO_ADVANCEDTYPOGRAPHY, TO_ADVANCEDTYPOGRAPHY)
    lR = SendMessage(lHwnd, EM_SETPARAFORMAT, 0, tP2)
End Function