The IsDBCSLeadByte function determines whether a character is a lead byte — that is, the first byte of a character in a double-byte character set (DBCS).
BOOL IsDBCSLeadByte(
BYTE TestChar // character to test
);
If the character is a lead byte, the return value is nonzero.
If the character is not a lead byte, the return value is zero. To get extended error information, call GetLastError.
Lead bytes are unique to double-byte character sets. A lead byte introduces a double-byte character. Lead bytes occupy a specific range of byte values. The IsDBCSLeadByte function uses the ANSI code page to check lead-byte ranges. To specify a different code page, use the IsDBCSLeadByteEx function.
Windows CE: The IsDBCSLeadByte function returns the following values:
Windows NT: Requires version 3.1 or later.
Windows: Requires Windows 95 or later.
Windows CE: Requires version 1.0 or later.
Header: Declared in winnls.h.
Import Library: Use kernel32.lib.
Unicode and Character Sets Overview, Unicode and Character Set Functions, IsDBCSLeadByteEx, MultiByteToWideChar