#include <Windows.h>
#include <tchar.h>
int main()
{
TCHAR ch = '%';
int nResult = (int)IsCharAlpha(ch);
if(nResult == 0)
{
MessageBox(NULL, _T("该字符不存在于字母表中"), _T(""), MB_OK);
}
else 
{
MessageBox(NULL, _T("该字符存在于字母表中"), _T(""), MB_OK);
}
return 0;
}

#include <Windows.h>
#include <tchar.h>
int main()
{
TCHAR ch = '9';
int nResult = (int)IsCharAlphaNumeric(ch);
if(nResult == 0)
{
MessageBox(NULL, _T("该字符不是数字"), _T(""), MB_OK);
}
else 
{
MessageBox(NULL, _T("该字符是数字"), _T(""), MB_OK);
}
return 0;
}