Data type conversion of char and TCHAR in VC

Char: A basic data type that can hold a single character in the Computer programming language (c, C + +, Java, VFP, etc.).

TCHAR: To satisfy Unicode encoding, the extension of Char, i.e. _t ("str"), represents the TCHAR type

C + + supports two strings, the conventional ANSI encoding (using the "package") and the Unicode encoding (using the L "" package), which corresponds to two sets of string string handlers, such as strlen and Wcslen, for handling two string char and TCHAR types, respectively.

WinNT.h header file:

typedef WCHAR TCHAR, *ptchar;

Indicates that TCHAR and WCHAR belong to the same type

Char sza[100]; ANSI String Buffer

WCHAR szw[100]; Unicode String Buffer

Normal Sprintf:all strings are ANSI

sprintf (Sza, "%s", "ANSI Str");

Converts Unicode string to ANSI

sprintf (Sza, "%s", L "Unicode Str");

Normal Swprintf:all strings are Unicode

swprintf (szw,l "% s", L "Unicode Str");

Converts ANSI string to Unicode

swprintf (szw,l "%s", "ANSI Str");

Note: The use of uppercase s and lowercase s

Application instance: Invoking the start MSC program through the system function program

void 

Wsus::onbnclickedok ()      
{
    CString strpath = NULL;     Application path String (TCHAR)
    char strchar[256];  Application path String (char)

    M_CUSTOMEDIT.GETWINDOWTEXTW (strpath);   Gets the path stored to the strpath

    strpath.replace (_t ("\"), _t ("\\\\"));	Replace "\" in strpath with "\", note the translator
    //sprintf (Strchar, "%s", "Mmc.exe", strpath);        TCHAR convert char type
    sprintf (strchar, "mmc.exe \%s\" ", strpath);        TCHAR converts char type

    MessageBox (strpath, _t ("title"));
    System (STRCHAR);                        System function calls start MSC program

    //winexec ((LPCSTR) _bstr_t (strpath), sw_show);   Calling EXE program
}