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  4. How to use C program to open a text file using Notepad?

How to use C program to open a text file using Notepad?

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  • Mircea NeacsuM Mircea Neacsu

    He also seems to have a spurious "cd..." at the start of his string. I'd guess that's what's causing his grief but my crystal ball is foggy :)

    Mircea

    G Offline
    G Offline
    Goh Kak Ng
    wrote on last edited by
    #6

    Thanks for your reply ... cd is " change of directory " to C:\Windows\System32 where notepad.exe is located.

    Mircea NeacsuM 1 Reply Last reply
    0
    • G Goh Kak Ng

      Thanks for your reply ... I have try ...

      system("C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.text ");

      The error massage is : 'C:\Windows\System32' is not recognized as Internal or External Command, Operable Program or Batch file.

      D Offline
      D Offline
      Dave Kreskowiak
      wrote on last edited by
      #7

      You missed a backslash just before notepad.exe. You don't even really need the entire path to Notepad. This will work just fine:

      system("notepad C:\\\\AHome\\\\testedit.text");
      

      Asking questions is a skill CodeProject Forum Guidelines Google: C# How to debug code Seriously, go read these articles.
      Dave Kreskowiak

      Richard DeemingR 1 Reply Last reply
      0
      • G Goh Kak Ng

        Thanks for your reply ... cd is " change of directory " to C:\Windows\System32 where notepad.exe is located.

        Mircea NeacsuM Offline
        Mircea NeacsuM Offline
        Mircea Neacsu
        wrote on last edited by
        #8

        Quote:

        cd is " change of directory "

        I know, and it shouldn't be there.

        Mircea

        G 1 Reply Last reply
        0
        • G Goh Kak Ng

          Thanks for your reply ... I have try ...

          system("C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.text ");

          The error massage is : 'C:\Windows\System32' is not recognized as Internal or External Command, Operable Program or Batch file.

          V Offline
          V Offline
          Victor Nijegorodov
          wrote on last edited by
          #9

          Goh Kak Ng wrote:

          system("C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.text ");

          You missed one backslash in the path. It must be:

          system("C:\\Windows\\System32\**\notepad.exe c:\\AHome\\**testedit.text ");

          G 1 Reply Last reply
          0
          • V Victor Nijegorodov

            Goh Kak Ng wrote:

            system("C:\\Windows\\System32\notepad.exe c:\\AHome\testedit.text ");

            You missed one backslash in the path. It must be:

            system("C:\\Windows\\System32\**\notepad.exe c:\\AHome\\**testedit.text ");

            G Offline
            G Offline
            Goh Kak Ng
            wrote on last edited by
            #10

            Yes. You are right! Try this work ...

            system("C:\\Windows\\System32\\notepad.exe c:\\AHome\\testedit ");

            Note that the test file name must be " testedit " and not " testedit.txt ". Otherwise, this file will not be found. Thanks!

            1 Reply Last reply
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            • Mircea NeacsuM Mircea Neacsu

              Quote:

              cd is " change of directory "

              I know, and it shouldn't be there.

              Mircea

              G Offline
              G Offline
              Goh Kak Ng
              wrote on last edited by
              #11

              Yes. you are right. cd should not be there. This is the right one ...

              system("C:\\Windows\\System32\\notepad.exe c:\\A Home\\testedit ");

              Thanks.

              1 Reply Last reply
              0
              • D Dave Kreskowiak

                You missed a backslash just before notepad.exe. You don't even really need the entire path to Notepad. This will work just fine:

                system("notepad C:\\\\AHome\\\\testedit.text");
                

                Asking questions is a skill CodeProject Forum Guidelines Google: C# How to debug code Seriously, go read these articles.
                Dave Kreskowiak

                Richard DeemingR Offline
                Richard DeemingR Offline
                Richard Deeming
                wrote on last edited by
                #12

                Make sure you're not doing that from an elevated process. :) It's not quite DLL hijacking, but if an attacker could write a rogue notepad.exe into the %PATH% somewhere, they could then get your process to launch it with elevated privileges.


                "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

                "These people looked deep within my soul and assigned me a number based on the order in which I joined" - Homer

                D G 2 Replies Last reply
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                • Richard DeemingR Richard Deeming

                  Make sure you're not doing that from an elevated process. :) It's not quite DLL hijacking, but if an attacker could write a rogue notepad.exe into the %PATH% somewhere, they could then get your process to launch it with elevated privileges.


                  "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

                  D Offline
                  D Offline
                  Dave Kreskowiak
                  wrote on last edited by
                  #13

                  True :laugh:

                  Asking questions is a skill CodeProject Forum Guidelines Google: C# How to debug code Seriously, go read these articles.
                  Dave Kreskowiak

                  1 Reply Last reply
                  0
                  • Richard DeemingR Richard Deeming

                    Make sure you're not doing that from an elevated process. :) It's not quite DLL hijacking, but if an attacker could write a rogue notepad.exe into the %PATH% somewhere, they could then get your process to launch it with elevated privileges.


                    "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

                    G Offline
                    G Offline
                    Goh Kak Ng
                    wrote on last edited by
                    #14

                    Could you help me to understand what do you mean by " elevated process "?

                    Richard DeemingR 1 Reply Last reply
                    0
                    • G Goh Kak Ng

                      Could you help me to understand what do you mean by " elevated process "?

                      Richard DeemingR Offline
                      Richard DeemingR Offline
                      Richard Deeming
                      wrote on last edited by
                      #15

                      User Account Control (Windows 10) - Microsoft 365 Security | Microsoft Docs[^] How User Account Control works (Windows 10) - Microsoft 365 Security | Microsoft Docs[^]


                      "These people looked deep within my soul and assigned me a number based on the order in which I joined." - Homer

                      "These people looked deep within my soul and assigned me a number based on the order in which I joined" - Homer

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