Date: 02-16-2022
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created by gbSnippets
'The following code uses various message to get the topline of a RichEdit
'control and then the text from that line.
'Compiler Comments:
'This code is written to compile with PBWin10. To compile with PBWin9,
'add this line:
#Include "CommCtrl.inc"
'Primary Code:
Function GetTopLine(ByVal hRichEdit as DWord) As String
Local buf$, iTopLine&, iLineLength&, iCharPos&
iTopLine& = SendMessage(hRichEdit, %EM_GetFirstVisibleLine,0,0) 'visible line# at top of control
iCharPos& = SendMessage(hRichEdit, %EM_LineIndex, iTopLine&, 0) 'position of 1st char in top line
iLineLength& = SendMessage(hRichEdit, %EM_LineLength, iCharPos&, 0) 'length of line starting at that char position
buf$ = Space$(iLineLength&)
SendMessage(hRichEdit, %EM_GetLine, iTopLine&, StrPTR(buf$)) 'entire line of text
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
MsgBox GetTopLine(hRichEdit)
End If
End Function
Function GetTopLine(ByVal hRichEdit as DWord) As String
Local buf$, iTopLine&, iLineLength&, iCharPos&
iTopLine& = SendMessage(hRichEdit, %EM_GetFirstVisibleLine,0,0) 'visible line# at top of control
iCharPos& = SendMessage(hRichEdit, %EM_LineIndex, iTopLine&, 0) 'position of 1st char in top line
iLineLength& = SendMessage(hRichEdit, %EM_LineLength, iCharPos&, 0) 'length of line starting at that char position
buf$ = Space$(iLineLength&)
SendMessage(hRichEdit, %EM_GetLine, iTopLine&, StrPTR(buf$)) 'entire line of text
Function = buf$
End Function
'gbs_00228
'Date: 03-10-2012
http://www.garybeene.com/sw/gbsnippets.htm