Re: Calling NewEra DLL from Delphi

On 2 Nov 98, at 11:44, Arjen Brienen wrote: > We made a DLL from NewEra source code. All NewEra functions that are > exported are wrapped in C++ functions, so the 'PushArgs' and 'PopArgs' > functions can be used. The resulting DLL is called from a Delphi program. > We encounter the following problems: 1. Calling our own functions seems to > work well, but as soon as we call a NewEra function like 'Display' the > call seems to end up in an infinite loop. 2. All parameter values passed > from C to NewEra using the appropriate 'PushArgs' function are set to null > in the NewEra function. Both questions are probably caused by the same problem... Before the NE stack can be used, it must be initialized. This can usually be done by calling the 'fgl_start' function. More info can be found in the manuals (4GL - not RDS - does have some info). Look for the appendix that covers calling C functions. In all likelihood, a built-in function like DISPLAY calls other built-in functions, making use of the stack. Hence the problem. HTH. -- Ciao, Billy Now 'ear this: "Tyson was provoked by Holyfield. The videotape clearly shows Holyfield hitting him."