Detect URLs in RichTextBox (using EM_AUTOURLDETECT)
This code snippet makes use of RichEdit 2.0's new EM_AUTOURLDETECT message. When you type in a valid webiste address e.g. www.planetsourcecode.com, it will be coloured in blue, then underlined. When the mouse pointer is over it, it will change to a hand icon, and when you click it, it will open a new browser an navigate to the link.
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Zdrojový kód
'ADD THE FOLLOWING TO YOUR FORM
Private Sub Form_Load()
'Subclass the our main window so we can track when a link is hit
SubClassWnd hwnd
IDC_RICHEDIT = 4096
'Load the richedit 2 library
hModule = LoadLibrary("Riched20.dll")
If hModule Then
'Create the richedit window
hwndRichEdit = CreateWindowEx(WS_EX_CLIENTEDGE, RICHEDIT_CLASSA, "(Type in a URL)", WS_CHILD Or WS_VISIBLE Or ES_MULTILINE, 32, 32, 200, 200, hwnd, IDC_RICHEDIT, App.hInstance, 0)
'Set it up, such that it can automatically detect URLs
SendMessage hwndRichEdit, EM_SETEVENTMASK, 0, ByVal ENM_LINK
Call SendMessage(hwndRichEdit, EM_AUTOURLDETECT, 1, ByVal 0)
'Change to a more appropiate font
SetFont 12, "MS Sans Serif"
Else
MsgBox "Cannot initialize RichEdit."
Unload Me
End If
End Sub
Private Sub Form_Terminate()
'Free the library from memory
FreeLibrary hModule
End Sub
Private Sub Form_Unload(Cancel As Integer)
'Unsubclass the window
UnSubclassWnd hwnd
End Sub
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