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Type: Posts; User: AlanCCC

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  1. Can two functions in same DLL be called by two threads?

    I write a DLL MyDLL.dll with Visual C++ 2008, as follows:

    (1) MFC static linked
    (2) Using multi-thread runtime library.

    In the DLL, this is a global data m_Data shared by two export functions,...
  2. Replies
    12
    Views
    431

    Best way to allocate large memory

    In my Visual C++ app, I know the total objects(CMyObject) to be allocated is 16728064 and each object is 64 byte, so the total memory to be allocated is 1GB. The memory will be allocated in the...
  3. Invoke AfxThrowMemoryException cause "Access Violation"

    I want to override the operator new in a class, as follows:

    class CMyclass
    {
    public:
    void* operator new(size_t);
    void operator delete(void*);
    };
  4. Pass more parameter in overriding new operator

    I want to override new operator in C++, by following the instructions at http://www.cprogramming.com/tutorial/operator_new.html

    class CMyclass
    {
    public:
    CMyClass(BOOL...
  5. Replies
    3
    Views
    276

    How to clone an object in C++?

    I define two classes in C++, as follows:

    class CBaseClass
    {

    }

    class CDerivedClass : public CBaseClass
    {
  6. Replies
    7
    Views
    814

    Check if a given 8 byte is a valid double

    Hi,

    Is there a function in C/C++ that can check if a given 8-byte data block is a valid double value in the valid range?

    Thanks

    Alan
  7. Replies
    2
    Views
    1,112

    How to reduce the size of an object

    I am using Visual C++ to write an app. I write CMyObject class and may allocate a lot of instances of CMyObject object, so I want to reduce the size of CMyObject class.

    What I can figure out to do...
  8. Replies
    3
    Views
    359

    Store some variables in disk

    Hi,

    I am using Visual C++ to write an app. One problem is that the application will allocate a lot of object instances of a specific class CMyObject, maybe 400, 000. This will cause “Out of...
  9. How to use ATL 7.0 string conversion macros?

    I have a problem in using ATL 7.0 string conversion macros.

    My codes looks like this, which uses ATL 3.0 string conversion macros in the past:

    Void Myfunc()
    {
    USES_CONVERSION;

    LPSTR lpszA;...
  10. SEH hanlder cause compiler warnings and errors

    I use a SEH handler in my code, like this:
    __try
    {
    .. Some codes ...
    }
    __except(
    EXCEPTION_EXECUTE_HANDLER
    )
    {
    TRACE(_T("Exception"));
  11. Whether 0xFFFF is a valid Unicode character?

    Hi,

    I just wonder whether 0xFFFF is a valid Unicode character.

    When I using the following code:

    CStringW strTempW;
    CString strTemp1;
    INT_PTR nLen;
  12. Replies
    5
    Views
    810

    Re: Preallocate memory for CByteArray

    If I using the following codes:

    CByteArray Buf;

    Buf.SetSize(65536); // preallocate buffer

    ...

    ...
  13. Replies
    5
    Views
    810

    Preallocate memory for CByteArray

    Hi,

    I am using CByteArray as a buffer in Visual C++. I want to preallocate nSize memory for for CByteArray, so that later when I try to change the buffer, by calling SetSize, Add, Remove, etc., as...
  14. How to know if a VS2008 project supports multithread or not?

    Hi,

    I get a VC2008 project with full source. How to know whether it supports multithread or not? I think as long as the “Runtime Library” under “C/C++” - “Code generation” category is set to...
  15. Determine the type in the function template

    Hi,

    I want to detect the type in a function template, like this:

    template <class myType> myType Function (myType a, myType b) {

    // Detect the myType
    If (myType is int)
    {
  16. How to convert UTF-8 string to Unicode string

    I am using Visual Studio 2008. I just wonder if there are any library function in Windows SDK or MFC, or from third-parties, that can convert a UTF-8 string into Windows Unicode string(used in...
  17. Simple Web-based Teamwork Publishing System

    Hi,

    I am looking for a simple web-based teamwork publishing system, to trace the bugs of my software project.

    The system should:

    1. Be hosted on our webserver
    2. All the members of a...
  18. Replies
    2
    Views
    484

    Debug-only AfxMessageBox

    Hi, I am looking for a function like AfxMessageBox, but will only available in Debug Version, to display some error messages. I have thought of TRACE, but it will only dump the error message in the...
  19. Replies
    5
    Views
    927

    Re: Compatibility of MFC-based Automation?

    Then how to make it work with Word 2007, 2010 and 2013? Does these Word provides type libraries and I can import them with Class Wizard as well?
  20. Replies
    5
    Views
    927

    Compatibility of MFC-based Automation?

    I am reading the article http://msdn.microsoft.com/en-us/library/office/aa155776(v=office.10).aspx . I am just curious if I using Visual Studio Class Wizard to create MFC class based on Microsoft...
  21. Replies
    4
    Views
    850

    Problems in Passing File Handle to DLL

    I write a small application and using the following API to open the file:

    hHandle = CreateFile(lpszFileName, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
    NULL,...
  22. Replies
    7
    Views
    885

    Re: C++ encapsulation class for ADO

    The ATL OLEDB cusumer class seems must to be bound with a given data source. While my application will open and access the data source dymanically.
  23. Replies
    7
    Views
    885

    Re: C++ encapsulation class for ADO

    First of all, the CodeProject classes are not compatible with Unicode. After making necessary modifications, I rebuild it but get more compiler errors under VS2008(such as ambiguous calls to...
  24. Replies
    7
    Views
    885

    C++ encapsulation class for ADO

    Hi,

    I am looking for a good C++ encapsulation class for ADO. Just like CDatabase/CRecordset for ODBC and CDAODatabase/CDAORecordset for DAO. It is better to have a CADODatabase/CADORecordset for...
  25. Process wider date range than COleDateTime

    I have a ULONGLONG variable uDate which express the number of dates starting from 0001-01-01, up to 9999-12-31. Now I want to convert it into a string like this

    ‘yyyy-mm-dd’.

    However, the...
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