Search code examples
winapiassemblymasmcreatefileirvine32

Masm invoke createfile does not work

I am trying to create a file under C:\ in Masm code. but can never success. I don't know where is wrong with the code.

INCLUDE Irvine32.inc


.data
fileName BYTE "C:\\haha.txt",0
fileHandle HANDLE ?

.code

main PROC

INVOKE CreateFile,
ADDR filename, GENERIC_WRITE, DO_NOT_SHARE, null, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL,0


exit
main ENDP
END main

if I change the

fileName BYTE "haha.txt",0

it will success write the file haha.txt on the program's folder. i dont understand why it does not write out to C:\ also, i am using visual studio 2013 and i run the program by run it under debug,start without debugging.

Solution

  • It is a permission problem. If you run the program as administrator, you will see that the file is created. Just tested it with your code and it works.