[devilsknite1]

Ah, I've figured it out.

Maybe this could clarify some?

Here is the completed code:

PHP Code:

function onActionServerSide( afi, svar1, svar2 ) {
  switch( afi ) {
    case "receiveTextTypeFile": {
      temp.name_of_text = svar1;
      temp.text_type_file.loadLines( svar1 );
      triggerClient( "gui", name, "getTextTypeFile", temp.text_type_file, temp.name_of_text );
      break;
    }
    case "editTextTypeFile": {
      svar1.saveLines( svar2, 0 );
      break;
    }
  }
}

//#CLIENTSIDE

function onActionClientSide( afi, file, bvar ) {
  switch( afi ) {
    case "getTextTypeFile": {
      onEditTextTypeFile( bvar );
      TFE_MultiLineEdit1.setLines( file );
      break;
    }
  }
}

function onCreated() {
  if ( TFE_Window1.visible ) {
    TFE_Window1.destroy();
  }
  this.file_selected = NULL;
}

function onPlayerChats() {
  temp.tokens = player.chat.tokenize();
  if ( player.chat.starts( "/lf " ) ) {
    this.file_selected = temp.tokens[ 1 ];
    triggerServer( "gui", name, "receiveTextTypeFile", temp.tokens[ 1 ] );
  }
}

function onEditTextTypeFile( svar ) {
  new GuiWindowCtrl( "TFE_Window1" ) {
    profile = GuiBlueWindowProfile;
    clientRelative = true;
    clientExtent = "581,416";
    canClose = false;
    canMaximize = false;
    canMove = true;
    canResize = false;
    closeQuery = false;
    destroyOnHide = false;
    text = "Loaded file: '" @ svar @ "'. Editing in progress.";
    x = screenwidth / 2 - ( width / 2 );
    y = screenheight / 2 - ( height / 2 );

    new GuiScrollCtrl( "TFE_MultiLineEdit1_Scroll" ) {
      profile = GuiBlueScrollProfile;
      height = 369;
      hScrollBar = "dynamic";
      vScrollBar = "dynamic";
      width = 581;

      new GuiMLTextEditCtrl( "TFE_MultiLineEdit1" ) {
        profile = GuiBlueMLTextEditProfile;
        height = 16;
        horizSizing = "width";
        wordWrap = false;
        width = 556;
      }
    }
    
    new GuiButtonCtrl( "TFE_Button1" ) {
      profile = GuiBlueButtonProfile;
      height = 45;
      text = "Save";
      width = 67;
      y = 371;
    }
    
    new GuiButtonCtrl( "TFE_Button2" ) {
      profile = GuiBlueButtonProfile;
      height = 45;
      text = "Clear all";
      width = 67;
      x = 257;
      y = 371;
    }
    
    new GuiButtonCtrl( "TFE_Button3" ) {
      profile = GuiBlueButtonProfile;
      height = 45;
      text = "Cancel";
      width = 67;
      x = 514;
      y = 371;
    }
  }
}

function TFE_Button1.onAction() {
  if ( this.file_selected != NULL ) {
    triggerServer( "gui", name, "editTextTypeFile", TFE_MultiLineEdit1.getLines(), this.file_selected );
    TFE_Window1.destroy();
    player.chat = "Saved!";
  } else {
    player.chat = "Error with this.file_selected";
  }
}

function TFE_Button2.onAction() {
  player.chat = "Clearing...";
  TFE_MultiLineEdit1.text = "";
}

function TFE_Button3.onAction() {
  TFE_Window1.destroy();
}