banner banner Skip to main content

Types of DLL

When a DLL is loaded in an application, there are two methods of linking, i.e., Load-time Dynamic
Linking and Run-time Dynamic Linking. Static Linking happens during program development time, where as dynamic linking happens at run time.


  • Load time Dynamic Linking /Static Linking

In Load-time Dynamic Linking, an application makes explicit calls to exported DLL functions like local functions. To use load-time dynamic linking, a header(.h) file and an import library (.lib) file are provided, while compiling and linking the application. Thus, the linker will provide the system
with information required to load the DLL and resolve the exported DLL function locations at load
time.

  •    Run-time Dynamic Linking /Dynamic Linking
Dynamic linking implies the process that Windows uses to link a function call of one module to the
actual function in DLL. In Run-time Dynamic Linking, an application calls either the function Load-
Library or the function LoadLibraryEx to load the DLL at run time. After the DLL is successfully
loaded, the function GetProcAddress can be used to obtain the address of the exported DLL
function that has to be called. In case of run-time dynamic linking, an import library file is not
required.

Please note that Tally does not support Static Linking; only Dynamic Linking is possible.

Popular posts from this blog

Tally ODBC Driver Issue

Based on the Operating System bit (32/64) Tally has given the Exe. However the Micro Soft Excel application should be compatible to O/S and Tally.ERP9. Please note, On 64 Bit OS and 64Bit Tally.ERP9, a 32 Bit Excel application can act as a server with following steps. Please download from the Portal- ‘Microsoft Access Database Engine 2010 Redistributable’.  1. Install AccessDatabaseEngine_x64.exe Installed (steps given below separately.) 2. Excel 32 Bit (Excel 2003) Installed – and acting as server 3. Tally 64 Bit As Client –                      with ODBC Driver [ODBC: "Driver={Microsoft Excel Driver (*.xls, *.xlsx, *.xlsm, *.xlsb)};DBQ=C:Tally.ERP 9 4.5 Build 7Sample Data.xls;"] and  Tally 32 Bit as Client – with ODBC Driver [ODBC : "Driver={Microsoft Excel Driver *.xls)};DBQ=Sample Data.xls"] This will resolve the problem by NOT upgrading MS Office to 64 bit. you can continue using 32 bit application of Excel.
16 comments
Read more

LOG In function

During expression evaluation, intermediated values of the expression can be passed to calculator window and a log file ‘tdlfunc.log’ inside the application directory. This is very much helpful for debugging the expression. By default, logging is enabled inside the function. Syntax LOG : < Expression> Where, is the expression whose value needs to be passed to the calculator window. [Function : GetCurrentUserApprovelAmt] Parameter : PsvCurrentUser : String Variable : ApprovelAMT : Amount Return : Amount  10 : Walk Collection : ApprovelRequredColl  11 : If : $CustVAUser =  ##PsvCurrentUser  12 : Set : ApprovelAMT : $ApprovelAmount  12A : Log : ##ApprovelAMT  13 : End If  14 : End Walk  15 : Return : ##ApprovelAMT
Post a Comment
Read more

Differences between Applications and DLLs

Differences between Applications and DLLs Even though DLLs and applications are both executable program modules, they differ in several ways. To the end user, the most obvious difference is that DLLs are not programs that can be directly executed. From the system's point of view, there are two fundamental differences between applications and DLLs: An application can have multiple instances of itself running in the system simultaneously, whereas a DLL can have only one instance. An application can own things such as a Stack, Global memory, File handles, and a message queue, but a DLL cannot.
Read more