[SOLVED] issue with loading dll base address

habbas33

hi I want to load dll base address as shown in the code below

HMODULE g_hDll;
g_hDll = LoadLibraryW(_T("4FM.dll"));

when i run it says
" C:\Qt\UPI_ProIII_062414085021\fpga_lib\sipif.cpp:106: error: C2664: 'HMODULE LoadLibraryW(LPCWSTR)' : cannot convert argument 1 from 'const char [8]' to 'LPCWSTR'
Types pointed to are unrelated; conversion requires reinterpret_cast, C-style cast or function-style cast"

i also tried Qlibrary but i am not able to load on hmodule

habbas33

this works fine when i just run c++ using Visual studio 2010

IamSumit

Hiii.
Try this

LPCWSTR is a const char*
Try
QString path="4FM.dll";
std::string str = std::string(path.toAscii().data());
const char * var = str.c_str();
LoadLibraryW(var);

habbas33

not working :(

C:\Qt\UPI_ProIII_062414085021\fpga_lib\sipif.cpp:108: error: C2039: 'toAscii' : is not a member of 'QString'

IamSumit

[quote author="habbas33" date="1406193293"]not working :(

C:\Qt\UPI_ProIII_062414085021\fpga_lib\sipif.cpp:108: error: C2039: 'toAscii' : is not a member of 'QString'[/quote]
use toLatin1() instead of toAscii();
from Docs.
http://qt-project.org/wiki/Transition_from_Qt_4.x_to_Qt5

habbas33

_T() denotes either multi-byte or wide string on Win32 depending on whether or not _UNICODE is #defined. In your case, it must not be. So you have several options here:

Define _UNICODE. This is application wide, so it may have other consequences for strings in your application.
Instead of LoadLibraryW(), call LoadLibrary(), which will end up calling LoadLibraryA() behind the scenes if _UNICODE is not defined.
Instead of using _T("my string"), use L"my string" to force wide characters.
All of this is explained in some detail over at MSDN.