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@Calgary

Anyone knows the meaning of L in L"Hello! 32bit World"? Please see the C code inside.

jami(jami)
#include <windows.h>

#if defined(_X86_)
#define TEST_STRING L"Hello! 32bit World"
#define CROSS_ACCESS KEY_WOW64_64KEY
#elif defined(_WIN64)
#define TEST_STRING L"Hello! 64bit World"
#define CROSS_ACCESS KEY_WOW64_32KEY
#endif

VOID
PrintRegistryValueKey(
HKEY hKeyParent,
PWCHAR KeyName,
DWORD dwAccessMask,
DWORD dwHiveFlag
)
{
DWORD dwState=0;
HKEY hKey;
WCHAR Buffer[MAX_PATH];
DWORD dwSize = sizeof (Buffer);
DWORD dwType;
DWORD dwRet;
....
(#2190976@0)
Last Updated: 2005-3-20
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Replies, comments and Discussions:

  • 工作学习 / IT技术讨论 / Anyone knows the meaning of L in L"Hello! 32bit World"? Please see the C code inside. -jami(jami); 2005-3-20 {521} (#2190976@0)
    #include <windows.h>

    #if defined(_X86_)
    #define TEST_STRING L"Hello! 32bit World"
    #define CROSS_ACCESS KEY_WOW64_64KEY
    #elif defined(_WIN64)
    #define TEST_STRING L"Hello! 64bit World"
    #define CROSS_ACCESS KEY_WOW64_32KEY
    #endif

    VOID
    PrintRegistryValueKey(
    HKEY hKeyParent,
    PWCHAR KeyName,
    DWORD dwAccessMask,
    DWORD dwHiveFlag
    )
    {
    DWORD dwState=0;
    HKEY hKey;
    WCHAR Buffer[MAX_PATH];
    DWORD dwSize = sizeof (Buffer);
    DWORD dwType;
    DWORD dwRet;
    ....
    • L means wchar_t string constant. Each character has 2 bytes, e.g L'H' is 0x0048, L"H" is 0x00480000. -benbenli(笨笨); 2005-3-20 (#2190986@0)
      • Thank you. You are right! Just verified in VC. -jami(jami); 2005-3-20 (#2191013@0)

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