int i = 100;
long l = 2001;
float f=300.2;
double d=12345.119;
char username[]=＂女俠程佩君＂;
char temp[200];
char *buf;
CString str;
_variant_t v1;
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_bstr_t v2;itoa（i,temp,10）;///將i轉換為字符串放入temp中,最后一個數字表示十進制
itoa（i,temp,2）; ///按二進制方式轉換 ltoa（l,temp,10）;str = ＂2008北京奧運＂;
buf = （LPSTR）（LPCTSTR）str; v1 = （_bstr_t）＂程序員＂;
buf = _com_util::ConvertBSTRToString（（_bstr_t）v1）;strcpy（temp,＂123＂）; i = atoi（temp）; l = atol（temp）; d = atof（temp）;str.Format（＂%d＂,i）; str.Format（＂%f＂,i）; str = username;char *p=_com_util::ConvertBSTRToString（b）;VARIANT va;
int a=2001;
va.vt=VT_I4;///指明整型數據
va.lVal=a; ///賦值unsigned char bVal; VT_UI1
short iVal; VT_I2
long lVal; VT_I4
float fltVal; VT_R4
double dblVal; VT_R8
VARIANT_BOOL boolVal; VT_BOOL
SCODE scode; VT_ERROR
CY cyVal; VT_CY
DATE date; VT_DATE
BSTR bstrVal; VT_BSTR
IUnknown FAR* punkVal; VT_UNKNOWN
IDispatch FAR* pdispVal; VT_DISPATCH
SAFEARRAY FAR* parray; VT_ARRAY*
unsigned char FAR* pbVal; VT_BYREFVT_UI1
short FAR* piVal; VT_BYREFVT_I2
long FAR* plVal; VT_BYREFVT_I4
float FAR* pfltVal; VT_BYREFVT_R4
double FAR* pdblVal; VT_BYREFVT_R8
VARIANT_BOOL FAR* pboolVal; VT_BYREFVT_BOOL
SCODE FAR* pscode; VT_BYREFVT_ERROR
CY FAR* pcyVal; VT_BYREFVT_CY
DATE FAR* pdate; VT_BYREFVT_DATE
BSTR FAR* pbstrVal; VT_BYREFVT_BSTR
IUnknown FAR* FAR* ppunkVal; VT_BYREFVT_UNKNOWN
IDispatch FAR* FAR* ppdispVal; VT_BYREFVT_DISPATCH
SAFEARRAY FAR* FAR* pparray; VT_ARRAY*
VARIANT FAR* pvarVal; VT_BYREFVT_VARIANT
void FAR* byref; VT_BYREF long l=222;
ing i=100;
_variant_t lVal（l）;
lVal = （long）i;COleVariant v3 = ＂字符串＂, v4 = （long）1999;
CString str =（BSTR）v3.pbstrVal;
long i = v4.lVal;LPARAM lParam;
WORD loValue = LOWORD（lParam）;///取低16位
WORD hiValue = HIWORD（lParam）;///取高16位 WORD wValue;
BYTE loValue = LOBYTE（wValue）;///取低8位
BYTE hiValue = HIBYTE（wValue）;///取高8位 
更多內容請看C/C++技術專題專題，或新聞熱點
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