Windows create file in memory

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• Visual Basic 6 and Earlier
• Create and Save file in Memory

1. Nov 2nd, 2006, 11:02 AM

   
   

   #1

   Create and Save file in Memory
   

   Dear How can I create file that is stored in only in memory not in the physical drive.SO that I can avoid the user editing it?

   Thanks in advance

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2. Nov 2nd, 2006, 11:03 AM

   
   

   #2

   Re: Create and Save file in Memory
   

   I asked a similar question once, for pretty much the same reason…security. It was highly difficult back then so don’t expect it to be at all easy now

   Well, everyone else has been doing it
   Loading a file into memory QUICKLY — Using SendKeys — HyperLabel — A highly customisable label replacement — Using resource files/DLLs with VB — Adding GZip to your projects
   Expect more to come in future
   If I have helped you, RATE ME!

   I love helping noobs with their VB problems (probably because, as an amateur programmer, I am only slightly better at VB than them :-)) but if you SERIOUSLY want to get help for free from a community such as VBForums, you have to first have a grounding (basic knowledge) in VB6, otherwise you’re way too much work to help…You’ve got to give a little if you want to get help from us, in other words!

   And we DON’T do your homework. If your tutor doesn’t teach you enough to help you make the project without his or her help, FIND A BETTER TUTOR or try reading books on programming! We are happy to help with minor things regarding the project, but you have to understand the rest of it if you want our help to be useful.

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3. Nov 2nd, 2006, 11:04 AM

   
   

   #3

   Re: Create and Save file in Memory
   

   I think that’s what ROM is for (Read-Only Memory) and i think you can’t edit it.

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4. Nov 2nd, 2006, 11:06 AM

   
   

   #4

   Re: Create and Save file in Memory
   

   Dear Gavio,
   Is it posible or not.The file types i want to create are Text,Word,XML and Html

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6. Nov 2nd, 2006, 11:11 AM

   
   

   #5

   Re: Create and Save file in Memory
   

   ROM, as its name suggests, is READ ONLY memory and is in no way usable for storing data…the closest you can get is EEPROMs like the BIOS (EEPROM, also known as EPROM, means electrically erasable programmable read-only memory) which *is* rewritable like that…flash memory is similar but I don’t know how similar it is though

   Writing a program to memory is doable…however, executing it from directly in memory is a lot harder because of antivirus security (that’s exactly how viruses used to propagate :-))

   Edit: However, if you’re creating text files they won’t be executed…so that should be doable

   Well, everyone else has been doing it
   Loading a file into memory QUICKLY — Using SendKeys — HyperLabel — A highly customisable label replacement — Using resource files/DLLs with VB — Adding GZip to your projects
   Expect more to come in future
   If I have helped you, RATE ME!

   I love helping noobs with their VB problems (probably because, as an amateur programmer, I am only slightly better at VB than them :-)) but if you SERIOUSLY want to get help for free from a community such as VBForums, you have to first have a grounding (basic knowledge) in VB6, otherwise you’re way too much work to help…You’ve got to give a little if you want to get help from us, in other words!

   And we DON’T do your homework. If your tutor doesn’t teach you enough to help you make the project without his or her help, FIND A BETTER TUTOR or try reading books on programming! We are happy to help with minor things regarding the project, but you have to understand the rest of it if you want our help to be useful.

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7. Nov 2nd, 2006, 11:13 AM

   
   

   #6

   Re: Create and Save file in Memory
   

   Originally Posted by danasegarane

   The file types i want to create are Text,Word,XML and Html

   Why not just put them into a string? Surely that’s «saving to memory»!

   What you need to do is give us more information about what you plan to do with it…if you want many programs to have access, for instance, whether it needs to remain there after the program closes, etc.

   Well, everyone else has been doing it
   Loading a file into memory QUICKLY — Using SendKeys — HyperLabel — A highly customisable label replacement — Using resource files/DLLs with VB — Adding GZip to your projects
   Expect more to come in future
   If I have helped you, RATE ME!

   I love helping noobs with their VB problems (probably because, as an amateur programmer, I am only slightly better at VB than them :-)) but if you SERIOUSLY want to get help for free from a community such as VBForums, you have to first have a grounding (basic knowledge) in VB6, otherwise you’re way too much work to help…You’ve got to give a little if you want to get help from us, in other words!

   And we DON’T do your homework. If your tutor doesn’t teach you enough to help you make the project without his or her help, FIND A BETTER TUTOR or try reading books on programming! We are happy to help with minor things regarding the project, but you have to understand the rest of it if you want our help to be useful.

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8. Nov 2nd, 2006, 10:31 PM

   
   

   #7

   Re: Create and Save file in Memory
   

   The idea behind is to keep the file in the memory and avoid the user from editing it.only my program has to acces the file, and after modification i will save the file in a physical path with encryption.

   Is there any method avaliable to keep the file in the memory.The file types are
   text,xml,html and word docuemts

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9. Nov 2nd, 2006, 10:35 PM

   
   

   #8

   Re: Create and Save file in Memory
   

   You’re still not giving the info we need! If only one program requires access to it, WHY even have a file and why not store it as data in a string or array…*that* is stored in memory.

   You’ve not told us anything of use yet…like how you intend to access the file, where it’ll be used, how many programs will need it, etc.

   Well, everyone else has been doing it
   Loading a file into memory QUICKLY — Using SendKeys — HyperLabel — A highly customisable label replacement — Using resource files/DLLs with VB — Adding GZip to your projects
   Expect more to come in future
   If I have helped you, RATE ME!

   I love helping noobs with their VB problems (probably because, as an amateur programmer, I am only slightly better at VB than them :-)) but if you SERIOUSLY want to get help for free from a community such as VBForums, you have to first have a grounding (basic knowledge) in VB6, otherwise you’re way too much work to help…You’ve got to give a little if you want to get help from us, in other words!

   And we DON’T do your homework. If your tutor doesn’t teach you enough to help you make the project without his or her help, FIND A BETTER TUTOR or try reading books on programming! We are happy to help with minor things regarding the project, but you have to understand the rest of it if you want our help to be useful.

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11. Nov 2nd, 2006, 10:41 PM

    
    

    #9

    Re: Create and Save file in Memory
    

    Only my program wiil access it .Any I have already mentioned the file types are
    text,html,word and xml.Only I will create and accees the files.The file size may range from 1 mb to 5 mb.

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12. Nov 2nd, 2006, 10:54 PM

    
    

    #10

    
    Hyperactive Member
    

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    Re: Create and Save file in Memory
    

    do you mean you want your program to only access the file, and say if some other program wants to edit the file while your program is running it will not allow it to open it is that what you mean or i chould be wrong.

    here a bit of code you can use to open the file in read lock mode.

    Code:

    Dim FilePtr As Long
    
    Private Sub Command1_Click()
        FilePtr = FreeFile
        Open "C:\test.txt" For Binary Lock Read As #FilePtr
        'write what ever code here to deal with file editing
        
    End Sub
    
    Private Sub Command2_Click()
        Close #FilePtr
    End Sub

    what the code will do is when you click Command1 and that you got a text file in c:\test.txt will open the file, so you can edit etc

    but if you try to access it with some other program eg notepad you just get a message like «The process cannot access the file because it is being used by another process.»

    you also get it if you try to move or copy the file, tho only works while your program still has the file open. untill it closes it , witch then you can do your encryption whatever.

    When your dreams come true.
    On error resume pulling hair out.

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13. Nov 2nd, 2006, 11:04 PM

    
    

    #11

    Re: Create and Save file in Memory
    

    Thanks for the reply.
    I will open the file with this
    x=Shell(«Notepad C:\test.txt»)
    Now i want to allow the user to edit the contents with this shelled part only.I want to restrict the user from opening from other note pad.How can I?

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14. Nov 3rd, 2006, 12:42 AM

    
    

    #12

    Re: Create and Save file in Memory
    

    you could create a ram disk then use that for your working area, which will remain after your program close, until you shut down, but a ram disk is still available to other users. but if you are opening/ creating a word document, you can make an instance of word as visible = false text files and html can be stored as a string, and accessed in memory for reading /editing, but unless saved are not available after the program closes, xml files depend how you want to access them

    also you can set the file attributes of the notepad file to hidden readonly system etc after you open your copy, or just plain delete it and save it again afterwards, but in event of power off it is gone

    i do my best to test code works before i post it, but sometimes am unable to do so for some reason, and usually say so if this is the case.
    Note code snippets posted are just that and do not include error handling that is required in real world applications, but avoid On Error Resume Next

    dim all variables as required as often i have done so elsewhere in my code but only posted the relevant part

    come back and mark your original post as resolved if your problem is fixed
    pete

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