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AnswerRe: IMPLEMENTING AND EXERCISING A FRACTION CLASS Pin
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QuestionReal-Time push server in C++ may i use it as unmanaged dlls so i can work on it using C# ? Pin
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AnswerRe: Real-Time push server in C++ may i use it as unmanaged dlls so i can work on it using C# ? Pin
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QuestionISSUE - TCP/IP sockets in MFC VS2017 Pin
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AnswerRe: ISSUE - TCP/IP sockets in MFC VS2017 Pin
Jochen Arndt21-Nov-17 1:59
professionalJochen Arndt21-Nov-17 1:59 
Probably a problem of structure packing / data alignment. With C/C++ structures and unions, member data are aligned by inserting padding bytes. How many bytes are inserted depends on the used compiler options where the default settings depend on the platform (CPU type and bit width).

When sending such structures via network to other systems, you must ensure that sender and receiver use the same packing / alignment. This is usally done by setting the alignment to one byte.

With Visual Studio use the #pragma pack[^] directive:
// Save current setting and select 1 byte
#pragma pack(push, 1)
union USendLive
{
    struct SSend
    {
        float fTestValue1;
        float fTestValue2;	
        char cChr;			
    } S;						
    unsigned char Buffer[LIVEUNISIZE];
} UNI;
// Restore previous setting
#pragma pack(pop)
Note that this might fail with existing (old) versions of your server and client. If so and you have to support old versions, you must check which alignment has been used and select that for packing.

BTW:
This forum is for managed C++ / CLI but your post would fit in the C++ / MFC forum.
AnswerRe: ISSUE - TCP/IP sockets in MFC VS2017 Pin
jschell22-Nov-17 9:05
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QuestionTo sort an array of integer's with recursive functions ? Pin
Tarun Jha18-Nov-17 3:46
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GeneralRe: To sort an array of integer's with recursive functions ? Pin
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SuggestionTo find hcf of n number by using only loops. Pin
Tarun Jha4-Nov-17 2:20
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GeneralRe: To find hcf of n number by using only loops. Pin
Richard MacCutchan4-Nov-17 21:10
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GeneralRe: To find hcf of n number by using only loops. Pin
Tarun Jha7-Nov-17 6:20
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GeneralRe: To find hcf of n number by using only loops. Pin
Richard MacCutchan7-Nov-17 7:00
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QuestionIs every C# feature available in C++/Managed ? Pin
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AnswerRe: Is every C# feature available in C++/Managed ? Pin
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Questionc++ Pin
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QuestionGet USB drive letter Pin
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SuggestionRe: Get USB drive letter Pin
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GeneralRe: Get USB drive letter Pin
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