>Hi
>
>I would like to know the correct way to delcare the following C function in VFP:
>
>int SetServer_IP (int context, char *Value);
>
>I used:
>
>Declare Integer SetServer_IP In XTran.dll As PP_SetServer_IP Integer lnContext,String lcIP
>
>but I am wondering whether the it should be:
>
>Declare Integer SetServer_IP In XTran.dll As PP_SetServer_IP Integer lnContext,String @ lcIP
>
>Thanks,
>Simon

Depends

(1)

Declare Integer SetServer_IP In XTran.dll As PP_SetServer_IP Integer lnContext,String lcIP

When calling

The string lcIP cannot be changed by the api
The string variable is not preceded by @

lcIP = 'something'
 = SetServer_IP(123, m.lcIP)

You can pass null

 = SetServer_IP(123, null)

(2)

Declare Integer SetServer_IP In XTran.dll As PP_SetServer_IP Integer lnContext,String @ lcIP

The string lcIP can be changed by the api
The string variable is preceded by @

lcIP = 'something'
 = SetServer_IP(123, @m.lcIP)

Impossible to pass null