[SOLVED] Visual Studio application on Qt

[Arthiego90]

Hello,
I have made a program in Visual Studio 2010, and its working well, but on Qt there are some errors. On Qt there is a msvc2010 compiler. I have no idea whats going on here, everything suppose to work.

Code:

@#ifdef _MSC_VER
#define _CRT_SECURE_NO_WARNINGS
#endif
#include <iostream>
#include <ole2.h>
#include <olectl.h>
#include "mainwindow.h"
#include <QApplication>

bool saveBitmap(LPCWSTR filename, HBITMAP bmp, HPALETTE pal)
{
bool result = false;
PICTDESC pd;

pd.cbSizeofstruct = sizeof(PICTDESC);
pd.picType = PICTYPE_BITMAP;
pd.bmp.hbitmap = bmp;
pd.bmp.hpal = pal;

LPPICTURE picture;
HRESULT res = OleCreatePictureIndirect( &pd, IID_IPicture, false, reinterpret_cast<void**>(&picture));

if(!SUCCEEDED(res))
    return false;
LPSTREAM stream;
res = CreateStreamOnHGlobal(0, true, &stream);

if(!SUCCEEDED(res))
{
    picture->Release();
    return false;
}

LONG bytes_streamed;
res = picture->SaveAsFile&#40;stream, true, &bytes_streamed&#41;;

HANDLE file = CreateFile(filename, GENERIC_WRITE, FILE_SHARE_READ, 0, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, 0&#41;;

if (!SUCCEEDED(res&#41; || !file)
{
stream->Release();
picture->Release();
return false;
}
HRESULT (__stdcall* dwp)(LPSTREAM,HGLOBAL*)=GetHGlobalFromStream;

HGLOBAL mem = 0;
dwp(stream,&mem);

GetHGlobalFromStream(stream, &mem);

LPVOID data = GlobalLock(mem);

DWORD bytes_written;

result   = !!WriteFile(file, data, bytes_streamed, &bytes_written, 0);
result  &= (bytes_written == static_cast<DWORD>(bytes_streamed&#41;);

GlobalUnlock(mem);
CloseHandle(file);

stream->Release();
picture->Release();

return result;

}

bool pstryk(int x, int y, int w, int h, LPCWSTR fname)
{
HDC hdcSource = GetDC(NULL);
HDC hdcMemory = CreateCompatibleDC(hdcSource);

int capX = GetDeviceCaps(hdcSource, HORZRES);
int capY = GetDeviceCaps(hdcSource, VERTRES);

HBITMAP hBitmap = CreateCompatibleBitmap(hdcSource, w, h);
HBITMAP hBitmapOld = (HBITMAP)SelectObject(hdcMemory, hBitmap);

BitBlt(hdcMemory, 0, 0, w, h, hdcSource, x, x, SRCCOPY);
hBitmap = (HBITMAP)SelectObject(hdcMemory, hBitmapOld);

DeleteDC(hdcSource);
DeleteDC(hdcMemory);

HPALETTE hpal = NULL;
if(saveBitmap(fname, hBitmap, hpal)) return true;
return false;

}

char* zwiekszenie(char *tablica)
{
char licznik[3];
int liczba, liczby[3];
licznik[0]=tablica[7];
licznik[1]=tablica[8];
licznik[2]=tablica[9];
for(int i=0;i<3;i++)
liczby[i]=((int)licznik[i])-48;
liczba=liczby[0]*100+liczby[1]*10+liczby[2];
liczba++;
liczby[0]=(liczba/100)+48;
liczby[1]=((liczba0)/10)+48;
liczby[2]=(liczba)+48;
for(int i=0;i<3;i++)
licznik[i]=(char)liczby[i];
tablica[7]=licznik[0];
tablica[8]=licznik[1];
tablica[9]=licznik[2];
return tablica;
}

int main(int argc, char *argv[])
{
QApplication a(argc, argv);
MainWindow w;
w.show();

int i=0;
wchar_t plik[15];
char nazwa[]="zdjecie000.bmpp";

for(int i=0;i<10;i++)
{
    mbstowcs(plik,nazwa,15);
    plik[14]=0;
    pstryk(0,0,1000,1000,plik);
    zwiekszenie(nazwa);
}

return a.exec&#40;&#41;;

}
@

Errors:
@main.obj:-1: błąd:LNK2019: unresolved external symbol imp__GetHGlobalFromStream@8 referenced in function "bool cdecl saveBitmap(wchar_t const *,struct HBITMAP *,struct HPALETTE *)" (?saveBitmap@@YA_NPB_WPAUHBITMAP__@@PAUHPALETTE__@@@Z)
main.obj:-1: błąd:LNK2019: unresolved external symbol imp__CreateStreamOnHGlobal@12 referenced in function "bool cdecl saveBitmap(wchar_t const *,struct HBITMAP *,struct HPALETTE *)" (?saveBitmap@@YA_NPB_WPAUHBITMAP__@@PAUHPALETTE__@@@Z)
main.obj:-1: błąd:LNK2019: unresolved external symbol imp__OleCreatePictureIndirect@16 referenced in function "bool cdecl saveBitmap(wchar_t const *,struct HBITMAP *,struct HPALETTE *)" (?saveBitmap@@YA_NPB_WPAUHBITMAP__@@PAUHPALETTE__@@@Z)
debug\teest.exe:-1: błąd:LNK1120: 3 unresolved externals
@

[SGaist]

Hi,

Do you link your project to Ole32.lib ?

[Arthiego90]

I had not thought about it, because on Visual Studio I didn't link any libraries. But linking solved the problem. I have added:
@#pragma comment(lib, "ole32.lib")
#pragma comment(lib, "OleAut32.lib")
@

and now there are no errors.

Thank you very much

[SGaist]

You're welcome !

Sure you did, you just didn't know about it :) Have a look in the linker properties of your project, you'll see a bunch of libraries already set to be linked.

If you are using a pro file your can also add

@LIBS += -lole32 -lOleAut32@

Since it's working now, please update the thread title prepending [solved] so other forum users may know a solution has been found :)