C++ newbie looking for help with linker error

lashnjo · Jul 3, 2007

[Linker error] undefined reference to
`HTMLWindow::HTMLWindow(std::string const&, std::string const&,
HINSTANCE__*, bool)'

Thats the error, and the code is below.
The complier is Dev-C++ 4.9.9.2.
Thank you if you can help.

#include <windows.h>
#include "HTMLWindow.h"

int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE unused__, LPSTR
lpszCmdLine, int nCmdShow) {

HTMLWindow* html_window = new HTMLWindow (

"<html><head>"
"<title>MSHTMLTest</title>" // seems a little useless in this
context
"</head><body>"
"<h1>This is a test</h1>"
"I offer the following links:"
"<ul>"
"<li><a href='http://www.google.com'>www.google.com</a>"
"<li><a href='http://www.adp-gmbh.ch'>www.adp-gmbh.ch</a>"
"<li><a href='http://www.yahoo.com'>www.yahoo.com</a>"
"</ul>"
"</body></html>",
"MSHTMLTest", hInstance,
false // not an url
);

MSG msg;
while (GetMessage(&msg, 0, 0, 0)) {
TranslateMessage(&msg);
if (msg.message >= WM_KEYFIRST &&
msg.message <= WM_KEYLAST) {
::SendMessage(html_window->hwnd_, msg.message, msg.wParam,
msg.lParam);
}
DispatchMessage(&msg);
}

return 0;
}

Robert Bauck Hamar · Jul 3, 2007

lashnjo said:
[Linker error] undefined reference to
`HTMLWindow::HTMLWindow(std::string const&, std::string const&,
HINSTANCE__*, bool)'

If you have defined HTMLWindow::HTMLWindow in a C++ file somewhere, you must
link it's object file together with your C++ file.

Thats the error, and the code is below.
The complier is Dev-C++ 4.9.9.2.

Dev-C++ is your IDE, not your compiler. The IDE just invokes the compiler,
but you could do this yourself. I guess your compiler is the GNU C++
compiler.

Thank you if you can help.

There is very little code to help.

#include <windows.h>
#include "HTMLWindow.h"

Does HTMLWindow.h also come with a HTMLWindow.c* (where c* stands for cpp,
cc, cxx, c++, or any other common C++ source file extension)? If it does,
then you must see to it that it is compiled with your project. For example,
you could add it to your project.

int CALLBACK WinMain(HINSTANCE hInstance, HINSTANCE unused__, LPSTR
lpszCmdLine, int nCmdShow) {

HTMLWindow* html_window = new HTMLWindow (

"<html><head>"
"<title>MSHTMLTest</title>" // seems a little useless in this
context
"</head><body>"
"<h1>This is a test</h1>"
"I offer the following links:"
"<ul>"
"<li><a href='http://www.google.com'>www.google.com</a>"
"<li><a href='http://www.adp-gmbh.ch'>www.adp-gmbh.ch</a>"
"<li><a href='http://www.yahoo.com'>www.yahoo.com</a>"
"</ul>"
"</body></html>",
"MSHTMLTest", hInstance,
false // not an url
);

MSG msg;
while (GetMessage(&msg, 0, 0, 0)) {
TranslateMessage(&msg);
if (msg.message >= WM_KEYFIRST &&
msg.message <= WM_KEYLAST) {
::SendMessage(html_window->hwnd_, msg.message, msg.wParam,
msg.lParam);
}
DispatchMessage(&msg);
}

return 0;
}

You have called a lot of functions here. None of them are defined by the
standard. You might be better off asking in a NG related to your compiler
or operating system.

Drawing missing in bitmap in a pure C win32 program	4	Jun 3, 2023
Need help with code on website (noob)	2	Jul 18, 2022
Help with my responsive home page	2	Dec 14, 2022
error LNK2019: unresolved external symbol _main referenced infunction ___tmainCRTStartup MSVCRTD.lib	2	Apr 5, 2010
SendMessage() function	2	Oct 27, 2009
Windows App - C++	34	Oct 19, 2004
Need help - trying to write a basic renderer	2	Mar 10, 2010
HELP!	2	Oct 13, 2008

C++ newbie looking for help with linker error

lashnjo

Robert Bauck Hamar

Ask a Question

Similar Threads

Members online

Forum statistics

Latest Threads