Help with text program...

The Problem:

szFileName can't be read from the ShellExecute command.

The Code(This is part of the WinProc):

Code:

case WM_COMMAND:
    {
        switch(LOWORD(wParam))
        {
                case ID_FILE_NEW:
                {
                        DestroyWindow(hEdit);
                                hEdit = CreateWindowEx(WS_EX_CLIENTEDGE, "EDIT", "", 
            WS_CHILD | WS_VISIBLE | WS_VSCROLL | WS_HSCROLL | ES_MULTILINE | ES_AUTOVSCROLL | ES_AUTOHSCROLL, 
            0, 0, 800, 600, hwnd, (HMENU)IDC_MAIN_EDIT, GetModuleHandle(NULL), NULL);


                }
                break;
                case ID_FILE_EXIT:
                {
                        SendMessage(hwnd, WM_CLOSE, 0, 0);
                }
                break;
                case ID_FILE_SAVE:
                {
                            OPENFILENAME sfn;
                            char szFileName[MAX_PATH] = ""; //definition of szFileName

                            ZeroMemory(&sfn, sizeof(sfn));

                            sfn.lStructSize = sizeof(sfn); // SEE NOTE BELOW
                            sfn.hwndOwner = hwnd;
                            sfn.lpstrFilter = "HTML Files (*.htm)\0*.htm\0Text Files(*.txt)\0*.txt\0RPGCode Files(*.prg)\0*.prg\0All Files (*.*)\0*.*\0";
                            sfn.lpstrFile = szFileName;
                            sfn.nMaxFile = MAX_PATH;
                            sfn.Flags = OFN_EXPLORER | OFN_PATHMUSTEXIST | OFN_HIDEREADONLY | OFN_OVERWRITEPROMPT;
                            sfn.lpstrDefExt = "html";

                            if(GetSaveFileName(&sfn))
                            {
                                       SaveTextFileFromEdit(hEdit, szFileName);
                            }

                }
                break;
                case ID_FILE_OPEN:
                {
                            OPENFILENAME ofn;
                            char szFileName[MAX_PATH] = ""; //definition of szFileName

                            ZeroMemory(&ofn, sizeof(ofn));

                            ofn.lStructSize = sizeof(ofn); // SEE NOTE BELOW
                            ofn.hwndOwner = hwnd;
                            ofn.lpstrFilter = "HTML Files (*.htm)\0*.htm\0Text Files(*.txt)\0*.txt\0RPGCode Files(*.prg)\0*.prg\0All Files (*.*)\0*.*\0";
                            ofn.lpstrFile = szFileName;
                            ofn.nMaxFile = MAX_PATH;
                            ofn.Flags = OFN_EXPLORER | OFN_FILEMUSTEXIST | OFN_HIDEREADONLY;
                            ofn.lpstrDefExt = "html";

                            if(GetOpenFileName(&ofn))
                            {
                                      LoadTextFileToEdit(hEdit, szFileName);
                            }     
               }
               break;
               case ID_HELP_ABOUT:{
                              DialogBox(GetModuleHandle(NULL),MAKEINTRESOURCE(IDD_ABOUT), hwnd, AboutDlgProc);
                              }
               break;
               case ID_EDIT_PREVIEW:{
                              ShellExecute(hwnd, "open", szFileName, NULL, NULL, SW_MAXIMIZE); //Shell Execute Command
                      }

The Specifics:

I want ShellExecute to open the file(If it's HTML in the Default Browser and nobody is dumb enough to preview a .txt file :P)

The program opens ASCII files. Whoopee.

What is in szFileName just before the ShellExecute call ? Your debugger should be able to help you with that one.

Code:

                case ID_FILE_OPEN:
                {
                            OPENFILENAME ofn;
                            char szFileName[MAX_PATH] = ""; //

This instance of szFileName is local to its block and unless you copy it somewhere it will be lost when the block ends (}).

Possibly you want to use something like szTempFileName in this block and on success copy its contents to the global szFileName variable. You may already be doing this in your LoadTextFileToEdit/SaveTextFileToEdit functions.

Code:

 if(GetOpenFileName(&ofn))
lstrcpy(szFileName, szTempFileName);