Part c:

 void CImExAPIDemoDlg: : EnumDevice () {

TCHAR szDisk [26]={0}; 

DWORD dwSize; 

Cstrings csValue=https://bbs.csdn.net/topics/_T (" "); 

Int count=EnumateUSBDevice (szDisk); 

M_ComList. ResetContent (); 

For (int iLoop=0; ILoop
DwSize=GetUDiskCapacity (szDisk [iLoop]); 

CsValue. The Format (_T (" % c: % d (GB) "), szDisk [iLoop], dwSize/2048); 

M_ComList. AddString (csValue); 
} 

I write vb part...

 Private Declare Function EnumateUSBDevice Lib "ImExLAPI. DLL" (ByVal szdisk As String) As Boolean 

Private Sub Command1_Click () 
Text1. Text=EnumateUSBDevice (f) 
End sub 

49 why errors generated exe can occasionally error program debugging is definitely an error, what is going wrong? This is enumerated to connect u mouth equipment program
The entire program a lot, I will first take a look at the estimate this would extrapolate the,,, thank you master!

CodePudding user response:

CodePudding user response:

You posted the c code, see EnumateUSBDevice function form of the statement,
From its call statement:
Int count=EnumateUSBDevice (szDisk);
Your VB6 API statement should be:
Private Declare Function EnumateUSBDevice Lib "ImExLAPI. DLL" (ByVal szdisk As String) As Long

CodePudding user response:

No, API statement should be like this:
Private Declare Function EnumateUSBDevice Lib "ImExLAPI. DLL" (lpBuffer as Any) as Long

Use:
Dim arrBuffer (51) as byte
Dim n as long

N=EnumateUSBDevice (arrBuffer (0))

C code in TCHAR szDisk [26]={0};
The szDisk buffer is used to "output", it is the 26 (26) drive, it is possible that 26 bytes, it could also be 52 bytes,
So I think in VB6 to better it 52 bytes of buffer (after all, now one little memory, not counting the matter),

CodePudding user response:

Or not, and why error, when debugging generated EXE run after can I write that so

CodePudding user response:

Int EnumateUSBDevice (TCHAR * szDisk);
This is to declare this is a pointer???????

CodePudding user response:

API function must have the complete interface specification, otherwise, who know how to call?