Date: 02-16-2022
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created by gbSnippets
'Sometimes you want the first 0-n characters, or m-n characters in the
'middle of a RichEdit control. Here's how to do it.
'Compiler Comments:
'This code is written to compile with PBWin10. To compile with PBWin9,
'add this line:
#Include "CommCtrl.inc"
'Primary Code:
'Here's a Function which uses the %EM_GetTextRange message to return
'text from specified character positions.
Function GetRECharsMN(hRE as Dword, iStart&, iEnd&) As String
Local T As TextRange, buf$
T.Chrg.cpmin = iStart& - 1 : T.Chrg.cpmax = iEnd&
T.lpstrText = StrPTR(Buf$)
SendMessage(hRE, %EM_GetTextRange, ByVal 0, VarPTR(T))
Function = Buf$
End Function
'Compilable Example: (Jose Includes)
#Compiler PBWin 10
#Compile EXE
#Dim All
%Unicode=1
#Include "win32api.inc"
#Include "RichEdit.inc"
Global hDlg As Dword, hRichEdit As Dword
%ID_RichEdit = 500
Function PBMain() As Long
Local style&, buf$
buf$ = "This is sample" + $CrLf + "text for the" + $CrLf + "edit control."
style& = %WS_Child Or %WS_Visible Or %ES_MultiLine Or %WS_VScroll Or %ES_AutoHScroll _
Or %WS_HScroll Or %ES_AutoVScroll Or %ES_WantReturn Or %ES_NoHideSel Or %WS_TabStop
Dialog New Pixels, 0, "Test Code",300,300,200,150, %WS_OverlappedWindow To hDlg
Control Add Button, hDlg, 100,"Push", 30,10,140,20
LoadLibrary("riched32.dll") : InitCommonControls
Control Add "RichEdit", hDlg, %ID_RichEdit, buf$,20,40,160,100, style&, %WS_Ex_ClientEdge
Control Handle hDlg, %ID_RichEdit To hRichEdit
Dialog Show Modal hDlg Call DlgProc
End Function
CallBack Function DlgProc() As Long
If CB.Msg = %WM_Command AND CB.Ctl = 100 AND CB.Ctlmsg = %BN_Clicked Then
Local i As Long
MsgBox GetRECharsMN(hRichEdit,2,7) 'characters 2 thru 7 'values must be > 0
End If
End Function
Function GetRECharsMN(hRE as Dword, iStart&, iEnd&) As String
Local T As TextRange, buf$
T.Chrg.cpmin = iStart& - 1 : T.Chrg.cpmax = iEnd&
T.lpstrText = StrPTR(Buf$)
SendMessage(hRE, %EM_GetTextRange, ByVal 0, VarPTR(T))
Function = Buf$
End Function
'gbs_00376
'Date: 03-10-2012
http://www.garybeene.com/sw/gbsnippets.htm