call of a WINAPI DLL with a struct

[fb35]

Hi,

I want to use the WINAPI SetCommTimeouts() function (winbase.h).

One parameter is a pointer to the COMMTIMEOUTS Struct.

I have defined a TypeDef a cluster with 5 U32 numbers, to correspond to the 5 DWORD of the CommTimeouts prototype. There should be no alignment issues as all members are DWORD, i.e. U32 in Labview, 4 bytes.

I have a program consisting of a simple CreateFileA(), SetCommTimeouts(), CloseHandle, all using kernell32.dll.

I have a 64 bit computer, with 32bit labview.

However, the SetCommTimeouts returns a modified structure with results different from what I set. Did I made anything wrong with the structure?

[matt.baker · Accepted solution]

It seems to work when I tried it. I did notice that the indicator had the radix set to hex whereas the input was decimal.

Note: It's best to try and post the full example that someone can try, so they don't have to waste time creating the setup (attached)

[fb35]

Yes, this works. Actually I have mistaken GetCommTimeouts instead of SetCommTimeouts!