createfile+deviceiocontrol(win98+vc)

NTDEV
1

Dear all

I want win32 apllication to communicate with a vxd by

createfile+deviceiocontrol . The vxd has already statically loaded by system.ini; But when entering

the breakpoint in the vxd, I can’t debug the vxd in

source mode.Before doing this,I can see source code

with command(file *);and I write my project only in C. I was confused with this problem.Who can tell me the reason and method of solving it?

thanks.

part of source code in vxd is :

switch (p->dioc_IOCtlCode)

{

case DIOC_OPEN:

return 0;

case DIOC_CLOSEHANDLE:

return 0;

case BAT_YP:

count=p->dioc_cbInBuf;

strcpy(a,(char*)p->dioc_InBuf);

strcpy((char*)(p->dioc_OutBuf),“AAA”);

*p->dioc_bytesret = 10;

return 0;

default:

return -1;

}

part of win32 application is:

m_hVxd = CreateFile(“\\.\kkk.vxd”,

0,0,0,

CREATE_ALWAYS,

FILE_FLAG_DELETE_ON_CLOSE,0);

if (m_hVxd != INVALID_HANDLE_VALUE)

AfxMessageBox(_T(“Install Vxd Successfully!”));

if(DeviceIoControl(m_hVxd,BAT_YP, (LPVOID)&bb, sizeof(bb),(LPVOID)&yp,sizeof(yp), &cb, NULL))

AfxMessageBox(“success”);

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