Question

我的开发环境： Windows 7 64位 Code :: blocks 13.12 with MinGW编译器。更改了Code :: blocks中的设置 - 仅限于设置 - ＆gt;编译器 - ＆gt;链接器设置 - ＆gt;其他链接器选项：-static-libgcc -static-libstdc++

这是我失败的代码： 主：

#include "main.h"

#include <iostream>
#include <objidl.h>
#include <Gdiplus.h>


using namespace std;
using namespace Gdiplus;
#pragma comment(lib, "gdiplus.lib")


MainCode /// Look better even then main() :).
{

    Execute_InitializeWindow; /// Initialize root window (For WinGUI)



    HWND hwnd = CreateWindowEx (
           0,                   /* Extended possibilites for variation */
           szClassName,         /* Classname */
           "Code::Blocks Template Windows App",       /* Title Text */
           WS_OVERLAPPEDWINDOW | WS_VISIBLE, /* default window */
           CW_USEDEFAULT,       /* Windows decides the position */
           CW_USEDEFAULT,       /* where the window ends up on the screen */
           544,                 /* The programs width */
           375,                 /* and height in pixels */
           HWND_DESKTOP,        /* The window is a child-window to desktop */
           NULL,                /* No menu */
           hThisInstance,       /* Program Instance handler */
           NULL                 /* No Window Creation data */
           );



    Graphics* hGraphics = Graphics::FromHWND(hwnd,false); /// <---------------- HERE IT FAILS!


    /// Massage handler
    while (1){ if (GetMessage (&msg, NULL, 0, 0) <= 0) {break;}

        /* Translate virtual-key messages into character messages */
        TranslateMessage(&msg);
        //cout << msg << endl;
        /* Send message to WindowProcedure */
        DispatchMessage(&msg);
    }


    return msg.wParam; // The program return-value is 0 - The value that PostQuitMessage() gave
}



LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    return DefWindowProc (hwnd, message, wParam, lParam);

    switch (message)                  /* handle the messages */
    {


            break;
        case WM_DESTROY:
            PostQuitMessage (0);       /* send a WM_QUIT to the message queue */
            break;
        default:                      /* for messages that we don't deal with */
            //cout << 1;
            return DefWindowProc (hwnd, message, wParam, lParam);
    }

    return 0;
}

主代码（名为main.h）：

#include <windows.h>




/// ---------------------------------------- Codes for Initialize of main GUI -----------------------------------------

#define MainCode int WINAPI WinMain (HINSTANCE hThisInstance,HINSTANCE hPrevInstance,LPSTR lpszArgument,int nCmdShow)

LRESULT CALLBACK WindowProcedure (HWND, UINT, WPARAM, LPARAM); // Declare Windows procedure

TCHAR szClassName[ ] = "my_program_root_name";


#define Execute_InitializeWindow                        \
                                                        \
    MSG msg;                                            \
                                                        \
    WNDCLASSEX wincl;                                   \
    wincl.hInstance = hThisInstance;                    \
    wincl.lpszClassName = szClassName;                  \
    wincl.lpfnWndProc = WindowProcedure;                \
    wincl.style = CS_DBLCLKS;                           \
    wincl.cbSize = sizeof (WNDCLASSEX);                 \
                                                        \
                                                        \
    wincl.hIcon = LoadIcon (NULL, IDI_APPLICATION);     \
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);   \
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);       \
    wincl.lpszMenuName = NULL;                          \
    wincl.cbClsExtra = 0;                               \
    wincl.cbWndExtra = 0;                               \
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;    \
                                                        \
    if (!RegisterClassEx (&wincl)) {return 1;}          \



/// --------------------------------------------------------------------------------------------------

问题： 排队失败Graphics* hGraphics = Graphics::FromHWND(hwnd,false);

当我尝试运行时，我收到此错误：

mingw32-g++.exe   -c "D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.cpp" -o "D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.o"
mingw32-g++.exe  -o "D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.exe" "D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.o"  -static-libgcc -static-libstdc++  
D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.o:main.cpp:(.text$_ZN7Gdiplus11GdiplusBasenwEj[__ZN7Gdiplus11GdiplusBasenwEj]+0xd): undefined reference to `GdipAlloc@4'
D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.o:main.cpp:(.text$_ZN7Gdiplus11GdiplusBasedlEPv[__ZN7Gdiplus11GdiplusBasedlEPv]+0xd): undefined reference to `GdipFree@4'
D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.o:main.cpp:(.text$_ZN7Gdiplus8GraphicsC1EP6HWND__i[__ZN7Gdiplus8GraphicsC1EP6HWND__i]+0x3a): undefined reference to `GdipCreateFromHWNDICM@8'
D:\גיבויים\DATA\Desktop\cpp gdi plus problem\main.o:main.cpp:(.text$_ZN7Gdiplus8GraphicsC1EP6HWND__i[__ZN7Gdiplus8GraphicsC1EP6HWND__i]+0x57): undefined reference to `GdipCreateFromHWND@8'
collect2.exe: error: ld returned 1 exit status
Process terminated with status 1 (0 minute(s), 1 second(s))
4 error(s), 0 warning(s) (0 minute(s), 1 second(s))

我花了很多时间......我不知道该怎么办。我意识到我需要Gdiplus的“def”文件。我发现了这个：https://sourceforge.net/u/earnie/winapi/winapi/ci/master/tree/lib/gdiplus.def

我尝试在链接器设置中添加它（在编译器 - ＆gt;链接器设置 - >其他链接器选项中）：-def gdiplus.def。在这种情况下，错误是相同的，但这次与不同的东西 - 在编译期间，它打印了很多关于从dll中提取函数的错误。它无法从dll中提取所有函数。具有相同错误消息的所有失败... symbol not definded

我感到有点迷茫......我在Google上寻找解决方案，但它没有帮助..我是C ++的新手

感谢帮助者！

Answer 1

将-lgdiplus添加到链接器选项。

C ++在Code :: Blocks中使用Gdiplus与MinGW编译器

1 个答案: