VB6四字节卡号相互转换源码
读卡器介绍：https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-17663462238.15.4c325b4344sGlU&id=18645135266
https://item.taobao.com/item.htm?spm=a1z10.5-c.w4002-17663462238.15.4c325b4344sGlU&id=18645135266
Private Sub Command1_Click()Dim H2b As DoubleDim L2b As DoubleDim i As IntegerDim HexStr, wg34 As StringDim lshDim mypiccdata(4) As Bytelsh = Val(Text1)If lsh > 4294967295# Then MsgBox "数据大于4字节会溢出！请重新输入", vbCritical + vbOKOnly, "提示" Text1.SetFocus Exit SubEnd IfH2b = Int(lsh / (65536))L2b = lsh - H2b * 65536HexStr = Right("0000" + Hex(H2b), 4) + Right("0000" + Hex(L2b), 4)Text4 = HexStrFor i = 0 To 3 mypiccdata(i) = "&H" + Mid(HexStr, i * 2 + 1, 2) Text2(i) = mypiccdata(i) Text3(i) = Right("00" + Hex(mypiccdata(i)), 2)Nextdoublecardhao = mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text5 = Format(doublecardhao, "00000000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text6 = Format(mypiccdata(1), "000") + Format(doublecardhao, "00000")doublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)wg34 = Format(doublecardhao, "00000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text7 = wg34 + Format(doublecardhao, "00000")End SubPrivate Sub Command2_Click()Dim i As IntegerDim HexStr As StringDim mypiccdata(4) As ByteDim doublecardhao As DoubleHexStr = Right("00000000" + Trim(Text4), 8)Text4 = HexStrFor i = 0 To 3 Text3(i) = Mid(HexStr, i * 2 + 1, 2) mypiccdata(i) = "&H" + Mid(HexStr, i * 2 + 1, 2) Text2(i) = mypiccdata(i)Nextdoublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text1 = Format(doublecardhao, "0000000000")doublecardhao = mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text5 = Format(doublecardhao, "00000000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text6 = Format(mypiccdata(1), "000") + Format(doublecardhao, "00000")doublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)wg34 = Format(doublecardhao, "00000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text7 = wg34 + Format(doublecardhao, "00000")End SubPrivate Sub Command3_Click()Dim i As IntegerDim HexStr As StringDim mypiccdata(4) As ByteDim doublecardhao As DoubleFor i = 0 To 3 If Text2(i) = "" Then MsgBox "请输入正确的十进制数据！", vbCritical + vbOKOnly, "提示" Text2(i).SetFocus Exit Sub End IfNextHexStr = ""For i = 0 To 3 mypiccdata(i) = Val(Text2(i)) Text3(i) = Right("00" + Hex(Val(Text2(i))), 2) HexStr = HexStr + Right("00" + Hex(Val(Text2(i))), 2)NextText4 = HexStrdoublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text1 = Format(doublecardhao, "0000000000")doublecardhao = mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text5 = Format(doublecardhao, "00000000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text6 = Format(mypiccdata(1), "000") + Format(doublecardhao, "00000")doublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)wg34 = Format(doublecardhao, "00000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text7 = wg34 + Format(doublecardhao, "00000")End SubPrivate Sub Command4_Click()Dim i As IntegerDim HexStr As StringDim mypiccdata(4) As ByteDim doublecardhao As DoubleFor i = 0 To 3 If Text3(i) = "" Then MsgBox "请输入正确的十六进制数据！", vbCritical + vbOKOnly, "提示" Text3(i).SetFocus Exit Sub End IfNextHexStr = ""For i = 0 To 3 mypiccdata(i) = "&H" + Trim(Text3(i)) Text2(i) = mypiccdata(i) HexStr = HexStr + Right("00" + Trim(Text3(i)), 2)NextText4 = HexStrdoublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text1 = Format(doublecardhao, "0000000000")doublecardhao = mypiccdata(1)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text5 = Format(doublecardhao, "00000000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text6 = Format(mypiccdata(1), "000") + Format(doublecardhao, "00000")doublecardhao = mypiccdata(0)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(1)wg34 = Format(doublecardhao, "00000")doublecardhao = mypiccdata(2)doublecardhao = doublecardhao * 256doublecardhao = doublecardhao + mypiccdata(3)Text7 = wg34 + Format(doublecardhao, "00000")End SubPrivate Sub Text1_KeyPress(KeyAscii As Integer) Select Case KeyAscii Case 13 Command1_Click Case vbKey0 To vbKey9, vbKeyBack Case Else KeyAscii = 0 End SelectEnd SubPrivate Sub Text2_KeyPress(Index As Integer, KeyAscii As Integer) Select Case KeyAscii Case vbKey0 To vbKey9, vbKeyBack Case Else KeyAscii = 0 End SelectEnd SubPrivate Sub Text2_LostFocus(Index As Integer)If Text2(Index) > 255 Then MsgBox "请输入0-255之间的数!", vbCritical + vbOKOnly, "提示" Text2(Index) = 0 Text2(Index).SetFocusEnd IfEnd SubPrivate Sub Text3_KeyPress(Index As Integer, KeyAscii As Integer)Select Case KeyAscii Case vbKey0 To vbKey9, vbKeyBack Case 97 To 102 Case 65 To 70 Case Else KeyAscii = 0 End SelectEnd SubPrivate Sub Text4_KeyPress(KeyAscii As Integer)Select Case KeyAscii Case 13 Command3_Click Case vbKey0 To vbKey9, vbKeyBack Case 97 To 102 Case 65 To 70 Case Else KeyAscii = 0 End SelectEnd Sub