VB/WinAPI, Help: DLL Function returns handle

Help: DLL Function returns handle

Author	Message
Dane Hubbar #1 / 3	Help: DLL Function returns handle Maybe someone can help me. A DLL function I am calling returns a Handle to a complex structure, which will then be used for other calls in the same DLL function list. How do I trick VB in letting the Function return a handle without giving me a type mismatch at Run-time. In C the fucntions would look something like this: Handle RfmHandle RfmHandle = rfmOpen() rfmWrite(RfmHandle,80) rfmRead(RfmHandle,80) What do I Declare rfmOpen as to return the handle and then how do I use that handle for the other two functions when I call them?? Thanx much if you can help me!!!
Fri, 08 Dec 2000 03:00:00 GMT

Henry J #2 / 3	Help: DLL Function returns handle The handle is a long, just declare a long variable is ok. Quote: >Maybe someone can help me. A DLL function I am calling returns a Handle to >a complex structure, which will then be used for other calls in the same DLL >function list. How do I trick VB in letting the Function return a handle >without giving me a type mismatch at Run-time. In C the fucntions would >look something like this: >Handle RfmHandle >RfmHandle = rfmOpen() >rfmWrite(RfmHandle,80) >rfmRead(RfmHandle,80) >What do I Declare rfmOpen as to return the handle and then how do I use that >handle for the other two functions when I call them?? >Thanx much if you can help me!!!
Sat, 09 Dec 2000 03:00:00 GMT

Jacky Kw #3 / 3	Help: DLL Function returns handle Quote: >Maybe someone can help me. A DLL function I am calling returns a Handle to >a complex structure, which will then be used for other calls in the same DLL >function list. How do I trick VB in letting the Function return a handle >without giving me a type mismatch at Run-time. In C the fucntions would >look something like this: >Handle RfmHandle >RfmHandle = rfmOpen() >rfmWrite(RfmHandle,80) >rfmRead(RfmHandle,80) >What do I Declare rfmOpen as to return the handle and then how do I use that >handle for the other two functions when I call them?? >Thanx much if you can help me!!! declare function rfmOpen lib "your dll" as long declare sub rfmWrite lib "your dll" (byval RfmHandle as long,byval variable1 as long) .... Jacky Kwok
Sat, 09 Dec 2000 03:00:00 GMT

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