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How to launch the default mail program

Posted on 2000-03-15
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Last Modified: 2010-04-04
Hi,
I would like to send an email using the default mail program (outlook express or whatever), and I would like to prewrite the reciver address, the subject and the message (or to predefine an attachment)
I am using D4.03
Who knows what to do ?

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Question by:mhervais
6 Comments
 
LVL 13

Accepted Solution

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Epsylon earned 320 total points
ID: 2620141
Try this:

function TForm1.CreateMail( sSubject : string; rgTo, rgCc, rgBcc, rgContent : TStrings ) : Boolean;
var
  sTo, sCc, sBcc, sContent, sURL : string;

  function LinesToStr( rgs : TStrings; const sDelim : string ) : string;
  var
    iIndex          : Integer;
  begin
    Result := '';
    for iIndex := 0 to rgs.Count - 1 do
    begin
      Result := Result + rgs[ iIndex ];
      if ( iIndex < rgs.Count - 1 ) then Result := Result + sDelim;
    end;
  end;

begin
  Result := False;
  if not ( Assigned( rgTo ) and Assigned( rgCc ) and Assigned( rgBcc ) and Assigned( rgContent ) )
    then Exit;
  sTo := LinesToStr( rgTo, '; ' );
  sBcc := LinesToStr( rgBcc, '; ' );
  sCc := LinesToStr( rgCc, '; ' );
  sContent := LinesToStr( rgContent, '%0D%0A' );
  sURL := 'mailto:' + sTo;
  if ( sCc <> '' ) then sURL := sURL + '?cc=' + sCc;
  if ( sBcc <> '' ) then sURL := sURL + '&bcc=' + sBcc;
  if ( sSubject <> '' ) then sURL := sURL + '&subject=' + sSubject;
  if ( sContent <> '' ) then sURL := sURL + '&body=' + sContent;
  Memo2.Text := sURL;
  Result := ShellExecute( 0, 'Open', PChar( sURL ), nil, nil, SW_SHOWNORMAL ) > 32;
end;

procedure TForm1.Button1Click(Sender: TObject);
begin
  CreateMail(Edit1.Text, ListBox1.Items, ListBox2.Items, ListBox3.Items, Memo1.Lines);
end;
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LVL 5

Expert Comment

by:TheNeil
ID: 2620156
Don't know about the subject or attachments using your default mail system but ShellExecute will do a lot of what you want to do:

ShellExecute(Form1.Handle, 'Open', 'MailTo:Bloke@Somewhere.com', '', '', SW_SHOW);

A better way might be just to use MAPI:

uses mapi;

FUNCTION SendEMail(Handle : THandle; Mail : TStrings):Cardinal;
TYPE
  TAttachAccessArray = ARRAY [0..0] OF TMapiFileDesc;
  PAttachAccessArray = ^TAttachAccessArray;
VAR
  MapiMessage : TMapiMessage;
  Receip      : TMapiRecipDesc;
  Attachments : PAttachAccessArray;
  AttachCount : INTEGER;
  iCount      : INTEGER;
  FileName    : STRING;
BEGIN
  fillChar(MapiMessage, SizeOf(MapiMessage), #0);
  Attachments := NIL;
  fillChar(Receip,SizeOf(Receip), #0);
  IF Mail.Values['to'] <> ''
  THEN
  BEGIN
    Receip.ulReserved := 0;
    Receip.ulRecipClass := MAPI_TO;
    Receip.lpszName := StrNew(PChar(Mail.Values['to']));
    Receip.lpszAddress := StrNew(PChar('SMTP:' + Mail.Values['to']));
    Receip.ulEIDSize := 0;
    MapiMessage.nRecipCount := 1;
    MapiMessage.lpRecips := @Receip;
  END;

  AttachCount := 0;
  FOR iCount := 0 TO MaxInt
  DO
  BEGIN
    IF Mail.Values['attachment' + IntToStr(iCount)] = ''
    THEN
      BREAK;
    AttachCount := AttachCount + 1;
  END;
 
  IF AttachCount > 0
  THEN
  BEGIN
    GetMem(Attachments,SizeOf(TMapiFileDesc) * AttachCount);
    FOR iCount := 0 TO (AttachCount - 1)
    DO
    BEGIN
      FileName := Mail.Values['attachment' + IntToStr(iCount)];
      Attachments[iCount].ulReserved := 0;
      Attachments[iCount].flFlags := 0;
      Attachments[iCount].nPosition := ULONG($FFFFFFFF);
      Attachments[iCount].lpszPathName := StrNew(PChar(FileName));
      Attachments[iCount].lpszFileName := StrNew(PChar(ExtractFileName(FileName)));
      Attachments[iCount].lpFileType := NIL;
    END;
    MapiMessage.nFileCount := AttachCount;
    MapiMessage.lpFiles := @Attachments^;
  END;

  IF Mail.Values['subject'] <> ''
  THEN
    MapiMessage.lpszSubject := StrNew(PChar(Mail.Values['subject']));
  IF Mail.Values['body'] <> ''
  THEN
    MapiMessage.lpszNoteText := StrNew(PChar(Mail.Values['body']));

  Result := MapiSendMail(0, Handle, MapiMessage,MAPI_DIALOG*Ord(Handle <> 0) OR MAPI_LOGON_UI OR MAPI_NEW_SESSION, 0);

  FOR iCount := 0 TO (AttachCount - 1)
  DO
  BEGIN
    strDispose(Attachments[iCount].lpszPathName);
    strDispose(Attachments[iCount].lpszFileName);
  END;

  IF assigned(MapiMessage.lpszSubject)
  THEN
    strDispose(MapiMessage.lpszSubject);
  IF assigned(MapiMessage.lpszNoteText)
  THEN
    strDispose(MapiMessage.lpszNoteText);
  IF assigned(Receip.lpszAddress)
  THEN
    strDispose(Receip.lpszAddress);
  IF assigned(Receip.lpszName)
  THEN
    strDispose(Receip.lpszName);
END;

procedure TForm1.Button1Click(Sender: TObject);
VAR
  mail : TStringList
BEGIN
  mail := TStringList.Create;
  mail.values['to']      := 'Bloke@Geeza.com';
  mail.values['subject'] := 'A subject';
  mail.values['body']    := 'Some body text (line 1)';
  mail.values['body']    := 'Some more body text (line 2)';
  mail.values['attachment0'] := 'c:\winnt\winnt256.bmp';
  mail.values['attachment1'] := 'c:\winnt\winnt.bmp';
  sendEMail(Application.Handle, mail);
  mail.Free;
END;

The Neil
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Expert Comment

by:rwilson032697
ID: 2621252
Listening
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LVL 4

Author Comment

by:mhervais
ID: 2621487
thanks for these answers. I will try them tomorrow and tell you

Regards, Marc
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Expert Comment

by:yk030299
ID: 2622050
listen
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LVL 4

Author Comment

by:mhervais
ID: 2626510
Points go to Epsylon whos proposal was fully working and preferred by my assistant who found it more easy to understand

Thanks to you two

Regards, Marc
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