Unitech PA500 Programming Manual

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7. Dynamic Load DLL
Compiler would not load the DLL while use dynamic load DLL, it help user to load the DLL if it exists while the
application executed. The follow is the example.
Note: Even user does not need include the header and lib file but need to know the function definition.
//////////////////////////////////////////////////////////////////////////////////////////
HINSTANCE g_hUSIDLL;
typedef BOOL (*lpfnUSI_GetScannerVersion)(LPTSTR model, LPTSTR firmware, LPTSTR sdk, int blen);
lpfnUSI_GetScannerVersion USI_GetScannerVersion;
g_hUSIDLL = LoadLibrary(L"\\Windows\\USI.dll");
if (g_hUSIDLL != NULL)
{
USI_GetScannerVersion = (lpfnUSI_GetScannerVersion)GetProcAddress(g_hUSIDLL,
TEXT("USI_GetScannerVersion"));
}
else
{
MessageBox(_T("Load library USI.dll fail"), NULL, MB_OK);
return;
}
TCHAR lstrmodel[50], lstrfirmware[50], lstrsdk[50];
if (USI_GetScannerVersion != NULL)
rc = USI_GetScannerVersion(lstrmodel, lstrfirmware, lstrsdk, sizeof(lstrmodel) + sizeof(lstrfirmware) +
sizeof(lstrsdk));
else
MessageBox(_T("USI_GetScanerVersion does not find"), NULL, MB_OK);
if (g_hUSIDLL != NULL)
FreeLibrary(g_hUSIDLL);
//////////////////////////////////////////////////////////////////////////////////////////

Unitech PA500 Specifications

System Memory

SDRAM	64 MB
Flash ROM	64 MB

Display

display resolution	240x320 QVGA
display type	Color Transflective TFT
touch screen	yes

Laser Bar Code Scanner

scan rate	104 scans/sec ± 12 scans/sec
scan angle default	47°±3°
scan angle reduced	35°±3°

Power

main battery voltage	3.7 V
main battery capacity	2200 mAh
rechargeable time	3.5 hours

Operating Environment

operating temperature	32°F to 122°F (0°C to 50°C)
storage temperature	-4°F to 140°F (-20°C to 60°C)
relative humidity	5% ~ 95% (non-condensing)

Weight and Dimensions

weight with battery and scan engine	Under 213 g
length	126 mm
height	23 mm