Changing OS Language SetLocaleInfo function

Question

I need to change the OS language in my C# application by importing the native SetLocale function.

[

DllImport("kernel32.dll", CharSet = CharSet

.Auto)]

 

public static extern int SetLocaleInfo(int locale, int lcType, String

lplcData);

However, I am no able to figure out the value to be passed to LCTYPE parameter and lplcData parameter.

My call to the function is:

int

 

lcid = GetSystemDefaultLCID();

 

int result = SetLocaleInfo(lcid, 0x00000001, "409");

Am i making the right call? result has a value 0 indicating failure.

Please help me out with this. What should the values to the three arguments be?

 

 

Answer 1

Read this

http://msdn.microsoft.com/en-us/library/windows/desktop/dd374049(v=vs.85).aspx

 

Answer 2

Try this below code: 

class Sample

{

public const int LOCALE_SSHORTDATE = 0x1F;

public const int LOCALE_SDATE = 0x1D;

[DllImport("kernel32.dll")]

static extern bool SetLocaleInfo(uint Locale, uint LCType, string lpLCData);

[DllImport("kernel32.dll")]

private static extern uint GetUserDefaultLCID();

public static void Main(string[] args)

{

uint lngLCID;

lngLCID = GetUserDefaultLCID();

bool ret1 = SetLocaleInfo(lngLCID, LOCALE_SSHORTDATE, "yyyy/MMM/dd");

bool ret2 = SetLocaleInfo(lngLCID, LOCALE_SDATE, "/");

const int LOCALE_ILANGUAGE = 0x1;

bool ret3 = SetLocaleInfo(lngLCID, LOCALE_ILANGUAGE, "0x401");

Console.ReadLine();

}

}