用VB怎么调用这样的函数

用VB如何调用这样的函数
用C写的
int   WINAPI   Sig_StartDial(WORD   wChNo,char*   DialNum,char*   PreDialNum,WORD   wMode);

在VB中这样调用可以吗？
dim     strTelNumber= "32548741 "
  Call   Sig_StartDial(i,   strTelNumber,   " ",   0)
朋友们帮看一下，谢谢！


[解决办法]
char* DialNum,这个是指针
[解决办法]
Declare Function Sig_StartDial Lib "youname.dll " (ByVal wChNo As string,byRef DialNum as string,byRef PreDialNum as string,ByVal wMode as string) As Integer
[解决办法]
前两天才用过类似的,字符串不用ByRef

而且WORD 对应于 Integer

Declare Function Sig_StartDial Lib "youname.dll " (ByVal wChNo As Integer,ByVal DialNum as string,ByVal PreDialNum as string,ByVal wMode as Integer) As Integer