pcsoft.us.windevCopyright 2026, PC SOFT20 Apr 2015 09:24:00 Z16 Apr 2015 16:04:00 ZHello, I have a library which i wrote using C. Now, I am trying integrate this library in to Windev windows application which I a creating, and i'm facing a serious problem. Below is API call I am doing value = API("<LIB_NAME", "API_NAME", &callback) where callback is my global procedure. Based on a particular event my library will do a call back. Now I am getting the callback after the event, but the application is getting crashed after this. Below is the error I am getting "Run - Time Check Failure #0 - The value of ESP was not properly saved across a function call. This is usually a result of calling a function declared with one calling convention with a function pointer declaredwith a different calling convention." As the error says it is parameter mismatch. but in my case just see below: 1. Callback declaration in Library : int (*Notification_CB_t) ( int type, int a, int b, int test); 2. One of API call: value = API("<LIB_NAME", "API_NAME", &callback) 3. Callback procedure definition : PROCEDURE callback(Type is int,DataInfo is int, TagInfo is int, local_status is int) Any help is appreciated since I am new to WinDev30WEBDEVen_UShttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function/read.awpmoderateur@pcsoft.fr (El moderador)webmaster@pcsoft.fr (El webmaster)guestpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-solved-using-dll-which-requires-callback-function-51644/read.awp20 Apr 2015 09:24:00 ZDone. Thanks :)https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-solved-using-dll-which-requires-callback-function-51644/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-solved-using-dll-which-requires-callback-function-51644/read.awpUsing a DLL which requires a callback to a functionok2bwellpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51597/read.awp17 Apr 2015 19:11:57 ZI hope this helps Must use [SDECL] FUNCTION DiskRead SDECL ALIAS "DiskRead"(BYVAL hDisk AS DWORD, BYVAL pBlockIndex AS QUAD …https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51597/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51597/read.awpUsing a DLL which requires a callback to a functionguestpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51590/read.awp17 Apr 2015 15:49:00 ZHi Naveen, When you click "Reply" you can change the subject line. Add [SOLVED] if you want! Best regards, Alexandre Lecl…https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51590/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51590/read.awpUsing a DLL which requires a callback to a functionguestpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51584/read.awp17 Apr 2015 12:25:00 ZHi Alexandre, Thaks for the reply. It workd after I mentioned (--stdcall) in my library for the callback decalration. Is ther…https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51584/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51584/read.awpUsing a DLL which requires a callback to a functionguestpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51568/read.awp16 Apr 2015 17:51:00 ZHi Naveen, Alors check which calling convention you are using in your DLL. By default in WinDev uses SDTCALL. You must inform…https://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51568/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51568/read.awpUsing a DLL which requires a callback to a functionguestpcsoft.us.windevhttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51567/read.awp16 Apr 2015 16:18:00 ZHi in your callback function, try declaring your parameters as system int instead Best regardshttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51567/read.awphttps://forum.pcsoft.fr/es-ES/pcsoft.us.windev/51566-using-dll-which-requires-callback-function-51567/read.awpUsing a DLL which requires a callback to a function