C++ Quellcode in VB6

14/05/2008 - 16:31 von Udo | Report spam
Hallo!

Kann man folgenden C++ Code in VB6 wandeln?


/* Code to find the device path for a usbprint.sys controlled
* usb printer and print to it
*/

#include <usb.h>
#include <usbiodef.h>
#include <usbioctl.h>
#include <usbprint.h>
#include <setupapi.h>
#include <devguid.h>
#include <wdmguid.h>


/* This define is required so that the GUID_DEVINTERFACE_USBPRINT variable is
* declared an initialised as a static locally, since windows does not
include it in any
* of its libraries
*/

#define SS_DEFINE_GUID(name, l, w1, w2, b1, b2, b3, b4, b5, b6, b7, b8) \
static const GUID DECLSPEC_SELECTANY name \
= { l, w1, w2, { b1, b2, b3, b4, b5, b6, b7, b8 } }

SS_DEFINE_GUID(GUID_DEVINTERFACE_USBPRINT, 0x28d78fad, 0x5a12, 0x11D1, 0xae,
0x5b, 0x00, 0x00, 0xf8, 0x03, 0xa8, 0xc2);

void SomeFunctionToWriteToUSB()
{
HDEVINFO devs;
DWORD devcount;
SP_DEVINFO_DATA devinfo;
SP_DEVICE_INTERFACE_DATA devinterface;
DWORD size;
GUID intfce;
PSP_DEVICE_INTERFACE_DETAIL_DATA interface_detail;

intfce = GUID_DEVINTERFACE_USBPRINT;
devs = SetupDiGetClassDevs(&intfce, 0, 0, DIGCF_PRESENT |
DIGCF_DEVICEINTERFACE);
if (devs == INVALID_HANDLE_VALUE) {
return;
}
devcount = 0;
devinterface.cbSize = sizeof(SP_DEVICE_INTERFACE_DATA);
while (SetupDiEnumDeviceInterfaces(devs, 0, &intfce, devcount,
&devinterface)) {
/* The following buffers would normally be malloced to he correct size
* but here we just declare them as large stack variables
* to make the code more readable
*/
char driverkey[2048];
char interfacename[2048];
char location[2048];
char description[2048];

/* If this is not the device we want, we would normally continue onto
the next one
* so something like if (!required_device) continue; would be added here
*/
devcount++;
size = 0;
/* See how large a buffer we require for the device interface details */
SetupDiGetDeviceInterfaceDetail(devs, &devinterface, 0, 0, &size, 0);
devinfo.cbSize = sizeof(SP_DEVINFO_DATA);
interface_detail = calloc(1, size);
if (interface_detail) {
interface_detail->cbSize = sizeof (SP_DEVICE_INTERFACE_DETAIL_DATA);
devinfo.cbSize = sizeof(SP_DEVINFO_DATA);
if (!SetupDiGetDeviceInterfaceDetail(devs, &devinterface,
interface_detail, size, 0, &devinfo)) {
free(interface_detail);
SetupDiDestroyDeviceInfoList(devs);
return;
}
/* Make a copy of the device path for later use */
strcpy(interfacename, interface_detail->DevicePath);
free(interface_detail);
/* And now fetch some useful registry entries */
size = sizeof(driverkey);
driverkey[0] = 0;
if (!SetupDiGetDeviceRegistryProperty(devs, &devinfo, SPDRP_DRIVER,
&dataType, (LPBYTE)driverkey, size, 0)) {
SetupDiDestroyDeviceInfoList(devs);
return;
}
size = sizeof(location);
location[0] = 0;
if (!SetupDiGetDeviceRegistryProperty(devs, &devinfo,
SPDRP_LOCATION_INFORMATION, &dataType, (LPBYTE)location, size, 0)) {
SetupDiDestroyDeviceInfoList(devs);
return;
}
usbHandle = CreateFile(interfacename, GENERIC_WRITE, FILE_SHARE_READ,
NULL, OPEN_ALWAYS, FILE_ATTRIBUTE_NORMAL |
FILE_FLAG_SEQUENTIAL_SCAN, NULL);
if (usbHandle != INVALID_HANDLE_VALUE) {
/* Now perform all the writing to the device ie.
* while (some condition) WriteFile(usbHandle, buf, size, &bytes_written);
*/
CloseHandle(usbHandle);
}
}
}
SetupDiDestroyDeviceInfoList(devs);
}
 

Lesen sie die antworten

#1 Thorsten Albers
14/05/2008 - 20:01 | Warnen spam
Udo schrieb im Beitrag
...
Kann man folgenden C++ Code in VB6 wandeln?
...



Ja, kann man.

-
Thorsten Albers albers(a)uni-freiburg.de
-

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