CreateProcess with golang - go

Question

Hello I am try to call CreateProcess from syscall
func CreateProcess(appName *uint16, commandLine *uint16, procSecurity *SecurityAttributes, threadSecurity *SecurityAttributes, inheritHandles bool, creationFlags uint32, env *uint16, currentDir *uint16, startupInfo *StartupInfo, outProcInfo *ProcessInformation) (err error)
But I got error num 123 ("The filename, directory name, or volume label syntax is incorrect."), The path of the calc.exe is correct.
package main
import (
"fmt"
"syscall"
)
func main() {
var pS syscall.SecurityAttributes
var tS syscall.SecurityAttributes
var iH bool = true
var cF uint32
var env uint16
var cD uint16
var sI syscall.StartupInfo
var pI syscall.ProccessInformation
var err error
err = syscall.CreateProcess(
syscall.StringToUTF16Ptr("c:\\windows\\system32\\calc.exe"),
syscall.StringToUTF16Ptr(""),
&pS,
&tS,
iH,
cF,
&env,
&cD,
&sI,
&pI)
fmt.Printf("Return: %d\n", err)
}

Answer 1

You incorrectly set parameter lpCurrentDirectory(from https://msdn.microsoft.com/en-us/library/windows/desktop/ms682425%28v=vs.85%29.aspx) :
The full path to the current directory for the process. The string can
also specify a UNC path.
If this parameter is NULL, the new process will have the same current drive and directory as the calling process. (This feature is
provided primarily for shells that need to start an application and
specify its initial drive and working directory.)
If you make it nil, then it will work.
However, if to take for a sample example from this, then your code can be rewritten as:
package main
import (
"fmt"
"syscall"
)
func main() {
var sI syscall.StartupInfo
var pI syscall.ProcessInformation
argv := syscall.StringToUTF16Ptr("c:\\windows\\system32\\calc.exe")
err := syscall.CreateProcess(
nil,
argv,
nil,
nil,
true,
0,
nil,
nil,
&sI,
&pI)
fmt.Printf("Return: %d\n", err)
}