Found the solution! Here it is, if somebody needs the description.
The webview_bind() function in DLL that expects to get a pointer to the
function in Pharo can be called like this:
```
WebViewLibrary >> bind: webview name: aString callback: aFFICallback arguments:
aByteString
```
```
^ self ffiCall: #(void webview_bind(void * webview, const char *
aString, FFICallback aFFICallback, void * aByteString))
```
Before doing the actual call, the callback should be made according to fn
signature:
```
doIt := FFICallback
```
```
signature: #( void (const char *seq, const char *req, void *
arg) )
```
```
block: [ :seq :req :arg |
```
```
“do the stuff”
```
```
].
```
And the call is then made as:
```
WebViewLibrary new bind: webview name: 'newJsFunctionName' callback: doIt
arguments: args.
```
The next challenge is, of course, threading ...
Best wishes,\
Tomaz
