Turning a positive register into a negative one.

[xandaz]

    Hey. I'm trying to move the File Pointer back to it's beggining but am having a hard time. Shouldn't NEG eax do the trick? Could SetFilePointer,hFile,0,0,FILE_BEGIN do the trick? Thanks for helping me out in advance.

[jj2007]

Which value is in eax?
What does the manual say about SetFilePointer?

[xandaz]

    Hi JJ. EAX has a variable positive number. Also i got over SetFilePointer. Thanks

[hutch--]

Using EAX will probably garrantee that it gets overwritten. Get used to using memory variables where you use EAX as transfer, NEG it then load it into a 32 bit variable.

[daydreamer]

Using EAX will probably garrantee that it gets overwritten. Get used to using memory variables where you use EAX as transfer, NEG it then load it into a 32 bit variable.

I prefer the rv macro
Mov variable, rv(apicall,a,b,c)
Some api calls,like SetTextColor and SetBkColor works great with push return value= old RGB color and pop later to restore colors

[hutch--]

That is not a distinction magnus, the rv macro simply feeds the return value (eax) into a variable. Its done as a notation convenience.

[xandaz]

   Thanks guys. You've benn helpful. ty