Qt：Windows函数是无法解析的外部符号 [英] Qt: windows functions are unresolved external symbols

问题描述

我正在尝试使用QtCreator中的te WinAPI编译一个类似helloworld的简单非Qt C ++应用程序。代码如下：

I'm trying to compile a simple helloworld-like non-Qt C++ application using te WinAPI in QtCreator. Here's the code:

#include <windows.h>

int main()
{
    HWND cons = GetConsoleWindow();
    SetWindowText(cons, L"I am the console window");
    MessageBox(cons, L"Hello world!", L"I am the MessageBox", MB_OK | MB_ICONERROR);
    return 0;
}

看起来很简单，但是当我尝试构建它时，编译失败并显示以下内容：

Looks very simple, but when I've tried to build it, the compilation fails with:

main.obj:-1: error: LNK2019: unresolved external symbol __imp__MessageBoxW@16 referenced in function _main
main.obj:-1: error: LNK2019: unresolved external symbol __imp__SetWindowTextW@8 referenced in function _main

<中未解析的外部符号__imp__SetWindowTextW @ 8

我开始寻求，发现了此，但对我没有任何帮助，因为当我写这篇文章时：

I started to seek, and I found this, but it wasn't helping me at all, because when I had written this:

LIBS += -L"C:\\Program Files (x86)\\Microsoft SDKs\\Windows\\v7.0A\\Lib"

甚至是这样：

LIBS += -L"C:\\Program Files (x86)\\Microsoft SDKs\\Windows\\v7.0A\\Lib\\shell32.lib"

在我的 .pro 中，这些符号仍然无法显示留恋。在每次更改之后，我对 .pro 文件内容运行了qmake。那么，有什么想法吗？

in my .pro, these "symbols" still stand unresolved. I ran qmake after each change to the .pro-file contents. So, any ideas?

推荐答案

-L 设置搜索路径DLL，但实际上并没有链接任何东西。实际的链接是通过 -l <​​/ code>完成的。不必为系统库设置搜索路径，但是您需要针对user32进行链接：

-L sets the search paths for DLLs, but it doesn't actually link anything. The actual linking is done via -l. Setting the search path for system libraries shouldn't be necessary, but you'll need to link against user32:

win32:LIBS += -luser32

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