VB6 怎么操作文件。求指点 http://blog.csdn.net/ben1978/article/details/751498或http://blog.csdn.net/ben1978/article/details/751498 解决方案 » 免费领取超大流量手机卡,每月29元包185G流量+100分钟通话, 中国电信官方发货 http://www.verysource.com/code/2356988_1/modfiledefine.bas.html '属这个最牛B了,用 WINDOWS API写的,挺全的。http://www.verysource.com/code/2356988_1/modfiledefine.bas.html 先使用InputB函数一次将文件读入内存(文件大小≤200MB)然后参考下面调用API转为base64string#pragma comment(lib,"crypt32")#include <windows.h>#include <stdio.h>#include <tchar.h>//+-------------------------------------------------------------------------// convert formatted string to binary// If cchString is 0, then pszString is NULL terminated and// cchString is obtained via strlen() + 1.// dwFlags defines string format// if pbBinary is NULL, *pcbBinary returns the size of required memory// *pdwSkip returns the character count of skipped strings, optional// *pdwFlags returns the actual format used in the conversion, optional//--------------------------------------------------------------------------BOOLWINAPICryptStringToBinaryA( IN LPCSTR pszString, IN DWORD cchString, IN DWORD dwFlags, IN BYTE *pbBinary, IN OUT DWORD *pcbBinary, OUT DWORD *pdwSkip, //OPTIONAL OUT DWORD *pdwFlags //OPTIONAL );//+-------------------------------------------------------------------------// convert formatted string to binary// If cchString is 0, then pszString is NULL terminated and// cchString is obtained via strlen() + 1.// dwFlags defines string format// if pbBinary is NULL, *pcbBinary returns the size of required memory// *pdwSkip returns the character count of skipped strings, optional// *pdwFlags returns the actual format used in the conversion, optional//--------------------------------------------------------------------------BOOLWINAPICryptStringToBinaryW( IN LPCWSTR pszString, IN DWORD cchString, IN DWORD dwFlags, IN BYTE *pbBinary, IN OUT DWORD *pcbBinary, OUT DWORD *pdwSkip, //OPTIONAL OUT DWORD *pdwFlags //OPTIONAL );#ifdef UNICODE#define CryptStringToBinary CryptStringToBinaryW#else#define CryptStringToBinary CryptStringToBinaryA#endif // !UNICODE//+-------------------------------------------------------------------------// convert binary to formatted string// dwFlags defines string format// if pszString is NULL, *pcchString returns the size of required memory in byte//--------------------------------------------------------------------------BOOLWINAPICryptBinaryToStringA( IN CONST BYTE *pbBinary, IN DWORD cbBinary, IN DWORD dwFlags, IN LPSTR pszString, IN OUT DWORD *pcchString );//+-------------------------------------------------------------------------// convert binary to formatted string// dwFlags defines string format// if pszString is NULL, *pcchString returns the size of required memory in byte//--------------------------------------------------------------------------BOOLWINAPICryptBinaryToStringW( IN CONST BYTE *pbBinary, IN DWORD cbBinary, IN DWORD dwFlags, IN LPWSTR pszString, IN OUT DWORD *pcchString );#ifdef UNICODE#define CryptBinaryToString CryptBinaryToStringW#else#define CryptBinaryToString CryptBinaryToStringA#endif // !UNICODE// dwFlags has the following defines#define CRYPT_STRING_BASE64HEADER 0x00000000#define CRYPT_STRING_BASE64 0x00000001#define CRYPT_STRING_BINARY 0x00000002#define CRYPT_STRING_BASE64REQUESTHEADER 0x00000003#define CRYPT_STRING_HEX 0x00000004#define CRYPT_STRING_HEXASCII 0x00000005#define CRYPT_STRING_BASE64_ANY 0x00000006#define CRYPT_STRING_ANY 0x00000007#define CRYPT_STRING_HEX_ANY 0x00000008#define CRYPT_STRING_BASE64X509CRLHEADER 0x00000009#define CRYPT_STRING_HEXADDR 0x0000000a#define CRYPT_STRING_HEXASCIIADDR 0x0000000b#define CRYPT_STRING_NOCR 0x80000000// CryptBinaryToString uses the following flags// CRYPT_STRING_BASE64HEADER - base64 format with certificate begin// and end headers// CRYPT_STRING_BASE64 - only base64 without headers// CRYPT_STRING_BINARY - pure binary copy// CRYPT_STRING_BASE64REQUESTHEADER - base64 format with request begin// and end headers// CRYPT_STRING_BASE64X509CRLHEADER - base64 format with x509 crl begin// and end headers// CRYPT_STRING_HEX - only hex format// CRYPT_STRING_HEXASCII - hex format with ascii char display// CRYPT_STRING_HEXADDR - hex format with address display// CRYPT_STRING_HEXASCIIADDR - hex format with ascii char and address display//// CryptBinaryToString accepts CRYPT_STRING_NOCR or'd into one of the above.// When set, line breaks contain only LF, instead of CR-LF pairs.// CryptStringToBinary uses the following flags// CRYPT_STRING_BASE64_ANY tries the following, in order:// CRYPT_STRING_BASE64HEADER// CRYPT_STRING_BASE64// CRYPT_STRING_ANY tries the following, in order:// CRYPT_STRING_BASE64_ANY// CRYPT_STRING_BINARY -- should always succeed// CRYPT_STRING_HEX_ANY tries the following, in order:// CRYPT_STRING_HEXADDR// CRYPT_STRING_HEXASCIIADDR// CRYPT_STRING_HEXASCII// CRYPT_STRING_HEXchar *flags[12]={"CRYPT_STRING_BASE64HEADER","CRYPT_STRING_BASE64","CRYPT_STRING_BINARY","CRYPT_STRING_BASE64REQUESTHEADER","CRYPT_STRING_HEX","CRYPT_STRING_HEXASCII","CRYPT_STRING_BASE64_ANY","CRYPT_STRING_ANY","CRYPT_STRING_HEX_ANY","CRYPT_STRING_BASE64X509CRLHEADER","CRYPT_STRING_HEXADDR","CRYPT_STRING_HEXASCIIADDR",};#define MAXC 1024BYTE b[22]={0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,0x41,0x42,0xB0,0xA1,0x4A,0x55,};BOOL r;DWORD len,dwFlags;TCHAR s[MAXC];int _tmain() { _tprintf(_T("API CryptBinaryToString in crypt32.dll Demonstration:\n")); for (dwFlags=0;dwFlags<12;dwFlags++) { if (dwFlags==2 || dwFlags==6 || dwFlags==7 || dwFlags==8) continue; r=CryptBinaryToString(b,22,dwFlags,NULL,&len); if (!r) { _tprintf(_T("CryptBinaryToString error!\n")); return 1; } if (len>MAXC) { _tprintf(_T("%d==len>MAXC==%d!\n"),len,MAXC); return 2; } r=CryptBinaryToString(b,22,dwFlags,s,&len); if (!r) { _tprintf(_T("CryptBinaryToString error!\n")); return 3; } _tprintf(_T("\n%s:[\n%s]\n"),flags[dwFlags],s); } return 0;}//API CryptBinaryToString in crypt32.dll Demonstration:////CRYPT_STRING_BASE64HEADER:[//-----BEGIN CERTIFICATE-----//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==//-----END CERTIFICATE-----//]////CRYPT_STRING_BASE64:[//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==//]////CRYPT_STRING_BASE64REQUESTHEADER:[//-----BEGIN NEW CERTIFICATE REQUEST-----//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==//-----END NEW CERTIFICATE REQUEST-----//]////CRYPT_STRING_HEX:[// 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f// 41 42 b0 a1 4a 55//]////CRYPT_STRING_HEXASCII:[// 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ................// 41 42 b0 a1 4a 55 AB..JU//]////CRYPT_STRING_BASE64X509CRLHEADER:[//-----BEGIN X509 CRL-----//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==//-----END X509 CRL-----//]////CRYPT_STRING_HEXADDR:[//0000 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f//0010 41 42 b0 a1 4a 55//]////CRYPT_STRING_HEXASCIIADDR:[//0000 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ................//0010 41 42 b0 a1 4a 55 AB..JU//]// vb 在调用窗体时出现“跳跃式”调用? 如何把程序写的让CPU利用率下降 请教高手如何实现这个功能? [--100分--]一百分求监控注册表的程序.分不够再加! 繁简转换问题 再问选择文本的问题。 请问了: datareport满足这样的条件格式,应该如何分组呢? 一波刚平,一波又起 ADO? 不给分是小狗 来来来来来来来来!!请教!!加分!! VB读取TXT文件并获取指定内容 vb6中datagrib如何在录入数据的时候做到检查数据的正确性
然后参考下面调用API转为base64string
#pragma comment(lib,"crypt32")
#include <windows.h>
#include <stdio.h>
#include <tchar.h>//+-------------------------------------------------------------------------
// convert formatted string to binary
// If cchString is 0, then pszString is NULL terminated and
// cchString is obtained via strlen() + 1.
// dwFlags defines string format
// if pbBinary is NULL, *pcbBinary returns the size of required memory
// *pdwSkip returns the character count of skipped strings, optional
// *pdwFlags returns the actual format used in the conversion, optional
//--------------------------------------------------------------------------
BOOL
WINAPI
CryptStringToBinaryA(
IN LPCSTR pszString,
IN DWORD cchString,
IN DWORD dwFlags,
IN BYTE *pbBinary,
IN OUT DWORD *pcbBinary,
OUT DWORD *pdwSkip, //OPTIONAL
OUT DWORD *pdwFlags //OPTIONAL
);
//+-------------------------------------------------------------------------
// convert formatted string to binary
// If cchString is 0, then pszString is NULL terminated and
// cchString is obtained via strlen() + 1.
// dwFlags defines string format
// if pbBinary is NULL, *pcbBinary returns the size of required memory
// *pdwSkip returns the character count of skipped strings, optional
// *pdwFlags returns the actual format used in the conversion, optional
//--------------------------------------------------------------------------
BOOL
WINAPI
CryptStringToBinaryW(
IN LPCWSTR pszString,
IN DWORD cchString,
IN DWORD dwFlags,
IN BYTE *pbBinary,
IN OUT DWORD *pcbBinary,
OUT DWORD *pdwSkip, //OPTIONAL
OUT DWORD *pdwFlags //OPTIONAL
);
#ifdef UNICODE
#define CryptStringToBinary CryptStringToBinaryW
#else
#define CryptStringToBinary CryptStringToBinaryA
#endif // !UNICODE//+-------------------------------------------------------------------------
// convert binary to formatted string
// dwFlags defines string format
// if pszString is NULL, *pcchString returns the size of required memory in byte
//--------------------------------------------------------------------------
BOOL
WINAPI
CryptBinaryToStringA(
IN CONST BYTE *pbBinary,
IN DWORD cbBinary,
IN DWORD dwFlags,
IN LPSTR pszString,
IN OUT DWORD *pcchString
);
//+-------------------------------------------------------------------------
// convert binary to formatted string
// dwFlags defines string format
// if pszString is NULL, *pcchString returns the size of required memory in byte
//--------------------------------------------------------------------------
BOOL
WINAPI
CryptBinaryToStringW(
IN CONST BYTE *pbBinary,
IN DWORD cbBinary,
IN DWORD dwFlags,
IN LPWSTR pszString,
IN OUT DWORD *pcchString
);
#ifdef UNICODE
#define CryptBinaryToString CryptBinaryToStringW
#else
#define CryptBinaryToString CryptBinaryToStringA
#endif // !UNICODE// dwFlags has the following defines
#define CRYPT_STRING_BASE64HEADER 0x00000000
#define CRYPT_STRING_BASE64 0x00000001
#define CRYPT_STRING_BINARY 0x00000002
#define CRYPT_STRING_BASE64REQUESTHEADER 0x00000003
#define CRYPT_STRING_HEX 0x00000004
#define CRYPT_STRING_HEXASCII 0x00000005
#define CRYPT_STRING_BASE64_ANY 0x00000006
#define CRYPT_STRING_ANY 0x00000007
#define CRYPT_STRING_HEX_ANY 0x00000008
#define CRYPT_STRING_BASE64X509CRLHEADER 0x00000009
#define CRYPT_STRING_HEXADDR 0x0000000a
#define CRYPT_STRING_HEXASCIIADDR 0x0000000b#define CRYPT_STRING_NOCR 0x80000000// CryptBinaryToString uses the following flags
// CRYPT_STRING_BASE64HEADER - base64 format with certificate begin
// and end headers
// CRYPT_STRING_BASE64 - only base64 without headers
// CRYPT_STRING_BINARY - pure binary copy
// CRYPT_STRING_BASE64REQUESTHEADER - base64 format with request begin
// and end headers
// CRYPT_STRING_BASE64X509CRLHEADER - base64 format with x509 crl begin
// and end headers
// CRYPT_STRING_HEX - only hex format
// CRYPT_STRING_HEXASCII - hex format with ascii char display
// CRYPT_STRING_HEXADDR - hex format with address display
// CRYPT_STRING_HEXASCIIADDR - hex format with ascii char and address display
//
// CryptBinaryToString accepts CRYPT_STRING_NOCR or'd into one of the above.
// When set, line breaks contain only LF, instead of CR-LF pairs.// CryptStringToBinary uses the following flags
// CRYPT_STRING_BASE64_ANY tries the following, in order:
// CRYPT_STRING_BASE64HEADER
// CRYPT_STRING_BASE64
// CRYPT_STRING_ANY tries the following, in order:
// CRYPT_STRING_BASE64_ANY
// CRYPT_STRING_BINARY -- should always succeed
// CRYPT_STRING_HEX_ANY tries the following, in order:
// CRYPT_STRING_HEXADDR
// CRYPT_STRING_HEXASCIIADDR
// CRYPT_STRING_HEXASCII
// CRYPT_STRING_HEX
char *flags[12]={
"CRYPT_STRING_BASE64HEADER",
"CRYPT_STRING_BASE64",
"CRYPT_STRING_BINARY",
"CRYPT_STRING_BASE64REQUESTHEADER",
"CRYPT_STRING_HEX",
"CRYPT_STRING_HEXASCII",
"CRYPT_STRING_BASE64_ANY",
"CRYPT_STRING_ANY",
"CRYPT_STRING_HEX_ANY",
"CRYPT_STRING_BASE64X509CRLHEADER",
"CRYPT_STRING_HEXADDR",
"CRYPT_STRING_HEXASCIIADDR",
};
#define MAXC 1024
BYTE b[22]={
0x00,0x01,0x02,0x03,0x04,0x05,0x06,0x07,0x08,0x09,0x0A,0x0B,0x0C,0x0D,0x0E,0x0F,
0x41,0x42,0xB0,0xA1,0x4A,0x55,
};
BOOL r;
DWORD len,dwFlags;
TCHAR s[MAXC];
int _tmain() {
_tprintf(_T("API CryptBinaryToString in crypt32.dll Demonstration:\n"));
for (dwFlags=0;dwFlags<12;dwFlags++) {
if (dwFlags==2
|| dwFlags==6
|| dwFlags==7
|| dwFlags==8) continue;
r=CryptBinaryToString(b,22,dwFlags,NULL,&len);
if (!r) {
_tprintf(_T("CryptBinaryToString error!\n"));
return 1;
}
if (len>MAXC) {
_tprintf(_T("%d==len>MAXC==%d!\n"),len,MAXC);
return 2;
}
r=CryptBinaryToString(b,22,dwFlags,s,&len);
if (!r) {
_tprintf(_T("CryptBinaryToString error!\n"));
return 3;
}
_tprintf(_T("\n%s:[\n%s]\n"),flags[dwFlags],s);
}
return 0;
}
//API CryptBinaryToString in crypt32.dll Demonstration:
//
//CRYPT_STRING_BASE64HEADER:[
//-----BEGIN CERTIFICATE-----
//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==
//-----END CERTIFICATE-----
//]
//
//CRYPT_STRING_BASE64:[
//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==
//]
//
//CRYPT_STRING_BASE64REQUESTHEADER:[
//-----BEGIN NEW CERTIFICATE REQUEST-----
//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==
//-----END NEW CERTIFICATE REQUEST-----
//]
//
//CRYPT_STRING_HEX:[
// 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
// 41 42 b0 a1 4a 55
//]
//
//CRYPT_STRING_HEXASCII:[
// 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ................
// 41 42 b0 a1 4a 55 AB..JU
//]
//
//CRYPT_STRING_BASE64X509CRLHEADER:[
//-----BEGIN X509 CRL-----
//AAECAwQFBgcICQoLDA0OD0FCsKFKVQ==
//-----END X509 CRL-----
//]
//
//CRYPT_STRING_HEXADDR:[
//0000 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f
//0010 41 42 b0 a1 4a 55
//]
//
//CRYPT_STRING_HEXASCIIADDR:[
//0000 00 01 02 03 04 05 06 07 08 09 0a 0b 0c 0d 0e 0f ................
//0010 41 42 b0 a1 4a 55 AB..JU
//]
//