[fpc-pascal] Windows programming tutorials for FPC

[James]

Thanks for the gersavefilenamea idea, I have used windows API function calls before in my Windows Console programs, so I thought I would try to get getsavefilenamea or ifilesavedialog to work in my console program.  So I thought I would start small and get message boxes to work on my console program, this was actually pretty easy, I just added the windows unit to my program and then changed my writeln's to windows.messagebox(0,pchar(TapFileName+' Not Found'),pchar('Error'),MB_OK);

And poof I get a message box when I encounter the error, and the program waits until I hit OK to continue.  Neat!  

 

So it's looking promising, that perhaps I can just keep it a console program that launches the save-as dialog somehow when needed.    This idea appeals to me for several reasons, first, I need to write the status of things somewhere,  it's easy to just have a writeln in a console application, but in a windows application, I have no idea how I would make some kind of text box to display this information.   Also, I want this program to start executing immediately, and if no user intervention is needed, I want it to launch, perform all tasks, and exit.  I just don't have anything to put on a form because the intent is that the user would only interact with this program if it encountered an error, or if the user needed to specify the output file name.

 

So my question is, how can I use Ifilesavedialog with just FreePascal in a console application?  I tried just accessing it the same as I did messagebox, but I just get an error stating the function is not found.   It seems like I ran across this before, I wanted to use a Windows API function that was not included in the windows unit and I was somehow able to add access to it on my own,  but I just can't recall now what function that was, or what program I was working on that needed it, or how it was accomplished.   Perhaps it is in the windows unit, or another unit, but I'm just not calling it correctly.   Current version of my program that uses message boxes for errors is below.

 

James

 

Program JobsList;

Uses CRT,Classes,Sysutils,windows;

Var

   TapFileRemainder,TapFileHeader,TapFileJobsList : tstrings;

   TapFileName,TapFileData,OutputTapFileName      : AnsiString;

   TapFile                                        : Text;

   TapFileHeaderActive                            : Boolean;

   StringCount                                    : LongInt;

Begin

   If ParamStr(1)<>'' Then

      Begin

         TapFileName:=ParamStr(1);

         If FileExists(TapFileName) Then

            Begin

               TapFileHeaderActive:=True;

               Assign(TapFile,TapFileName);

               Reset(TapFile);

               TapfileHeader:=TStringlist.Create;

               TapfileJobsList:=TStringlist.Create;

               TapfileRemainder:=TStringlist.Create;

               While not(EOF(TapFile)) do

                  Begin

                     Readln(Tapfile,TapFileData);

                     If TapfileHeaderActive then

                        Begin

                           If TapFileData='Call [Subroutines]' Then

                              Begin

                                 Writeln('Subroutine Section Found');

                                 TapFileHeaderActive:=False

                              End

                           Else

                           If Copy(TapFileData,1,15)='Tap File Name =' Then

                              Begin

                                 OutputTapFileName:=Copy(TapFileData,16,Length(TapFileData)-15);

                                 Writeln('Saving to: '+OutputTapFileName);

                              End

                           Else

                              TapfileHeader.Add(TapFileData)

                        End

                     Else

                        Begin

                           If Copy(TapFileData,1,6)='[Job #' Then

                              Begin

                                 Writeln(TapFileData);

                                 TapFileJobsList.Add('Call '+TapFileData);

                              End;

                           TapfileRemainder.Add(TapFileData)

                        End;

                  End;

               Close(TapFile);

               If OutputTapFileName='' Then

                  Begin

                     {Do something to get filename from windows Save-As dialog}

                     {OutputTapFileName:= Whatever-was-received-by-Windows-Save-As-dialog;}

                  End;

               If OutputTapFileName<>'' Then

                  Begin

                     Writeln('Writing ',TapFileHeader.count+TapFileJobsList.count+TapFileRemainder.count,' Lines to: '+OutputTapFileName);

                     Assign(TapFile,OutputTapFileName);

                     ReWrite(TapFile);

                     If TapFileHeader.count > 1 then

                     For StringCount:=0 to TapFileHeader.count-1 do

                        Writeln(TapFile,TapFileHeader[StringCount]);

                     If TapFileJobsList.count > 1 then

                     For StringCount:=0 to TapFileJobsList.count-1 do

                        Writeln(TapFile,TapFileJobsList[StringCount]);

                     If TapFileRemainder.count > 1 then

                     For StringCount:=0 to TapFileRemainder.count-1 do

                        Writeln(TapFile,TapFileRemainder[StringCount]);

                     Close(TapFile);

                  End

               Else

                  Begin

                     windows.messagebox(0,pchar('No Output Tap File Specified in Program'),pchar('Error'),MB_OK);

                  End;

               TapFileHeader.Free;

               TapFileJobsList.Free;

               TapFileRemainder.Free;

            End

         Else

            Begin

               windows.messagebox(0,pchar(TapFileName+' Not Found'),pchar('Error'),MB_OK);

            End;

      End

   Else

      Begin

         windows.messagebox(0,pchar('No File Name Specified'),pchar('Error'),MB_OK);

      End;

End.

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