A bunch of Linker Errors...

Hi guys, im working on the source code in this book "Programming Windows Fifth Edition" For some reason this sample program wont work, i get a bunch of linker errors. After just typing ALL this out its a little dissapointing. I think its probably because im useing Dev C++ instead of VC++. Am i missing libraries or something? Heres the code in case you need it. Please could someone tell me how to fix this? Thanks!

Sysmets.h

Code:

---

/*------------------------------------------------
    SYSMETS.H -- System Metrics Display Structure
------------------------------------------------*/

#define NUMLINES ((int)(sizeof sysmetrics / sizeof sysmetrics [0]))

struct
{
    int iIndex;
    TCHAR * szLabel;
    TCHAR * szDesc;
}
sysmetrics[] =
{
    SM_CXSCREEN,            TEXT("SM_CXSCREEN"),
                            TEXT("Screen width in pixels"),
    SM_CYSCREEN,            TEXT("SM_CYSCREEN"),   
                            TEXT("Screen height in pixels"),
    SM_CXVSCROLL,          TEXT("SM)CXVSCROOL"),
                            TEXT("Vertical Scroll Width"),
    SM_CYHSCROLL,          TEXT("SM_CYHSCROLL"),
                            TEXT("Horizontal Scroll Height"),
    SM_CYCAPTION,          TEXT("SM_CYCAPTION"),
                            TEXT("Caption Bar Height"),
    SM_CXBORDER,            TEXT("SM_CXBORDER"),
                            TEXT("Window border width"),
    SM_CYBORDER,            TEXT("SM_CYBORDER"),
                            TEXT("Window border height"),
    SM_CXFIXEDFRAME,        TEXT("SM_CXFIXEDFRAME"),
                            TEXT("Dialog window frame width"),
    SM_CYFIXEDFRAME,        TEXT("SM_CYFIXEDFRAME"),
                            TEXT("Dialog window frame height"),
    SM_CYVTHUMB,            TEXT("SM_CYVTHUMB"),
                            TEXT("Vertical scroll thumb height"),
    SM_CXHTHUMB,            TEXT("SM_CXHTHUMB"),
                            TEXT("Horizontal scroll thumb width"),
    SM_CXICON,              TEXT("SM_CXICON"),
                            TEXT("Icon Width"),
    SM_CYICON,              TEXT("SM_CYICON"),
                            TEXT("Icon Height"),
    SM_CXCURSOR,            TEXT("SM_CXCURSOR"),
                            TEXT("Cursor Width"),
    SM_CYCURSOR,            TEXT("SM_CYCURSOR"),
                            TEXT("Cursor Height"),
    SM_CYMENU,              TEXT("SM_CYMENU"),
                            TEXT("Menu Bar Height"),
    SM_CXFULLSCREEN,        TEXT("SM_CXFULLSCREEN"),
                            TEXT("Full screen client area width"),
    SM_CYFULLSCREEN,        TEXT("SM_CYFULLSCREEN"),
                            TEXT("Full screen client area height"),
    SM_CYKANJIWINDOW,      TEXT("SM_CYKANJIWINDOW"),
                            TEXT("Kanji Window Height"),
    SM_MOUSEPRESENT,        TEXT("SM_MOUSEPRESENT"),
                            TEXT("Mouse Present Flag"),
    SM_CYVSCROLL,          TEXT("SM_CYVSCROLL"),
                            TEXT("Verical scroll arrow height"),
    SM_CXHSCROLL,            TEXT ("SM_CXHSCROLL"),           
                              TEXT ("Horizontal scroll arrow width"),
    SM_DEBUG,                TEXT ("SM_DEBUG"),               
                              TEXT ("Debug version flag"),
    SM_SWAPBUTTON,          TEXT ("SM_SWAPBUTTON"),           
                              TEXT ("Mouse buttons swapped flag"),
    SM_CXMIN,                TEXT ("SM_CXMIN"),               
                              TEXT ("Minimum window width"),
    SM_CYMIN,                TEXT ("SM_CYMIN"),               
                              TEXT ("Minimum window height"),
    SM_CXSIZE,              TEXT ("SM_CXSIZE"),               
                              TEXT ("Min/Max/Close button width"),
    SM_CYSIZE,              TEXT ("SM_CYSIZE"),               
                              TEXT ("Min/Max/Close button height"),
    SM_CXSIZEFRAME,          TEXT ("SM_CXSIZEFRAME"),         
                              TEXT ("Window sizing frame width"),
    SM_CYSIZEFRAME,          TEXT ("SM_CYSIZEFRAME"),         
                              TEXT ("Window sizing frame height"),
    SM_CXMINTRACK,          TEXT ("SM_CXMINTRACK"),           
                              TEXT ("Minimum window tracking width"),
    SM_CYMINTRACK,          TEXT ("SM_CYMINTRACK"),           
                              TEXT ("Minimum window tracking height"),
    SM_CXDOUBLECLK,          TEXT ("SM_CXDOUBLECLK"),         
                              TEXT ("Double click x tolerance"),
    SM_CYDOUBLECLK,          TEXT ("SM_CYDOUBLECLK"),         
                              TEXT ("Double click y tolerance"),
    SM_CXICONSPACING,        TEXT ("SM_CXICONSPACING"),       
                              TEXT ("Horizontal icon spacing"),
    SM_CYICONSPACING,        TEXT ("SM_CYICONSPACING"),       
                              TEXT ("Vertical icon spacing"),
    SM_MENUDROPALIGNMENT,    TEXT ("SM_MENUDROPALIGNMENT"),   
                              TEXT ("Left or right menu drop"),
    SM_PENWINDOWS,          TEXT ("SM_PENWINDOWS"),           
                              TEXT ("Pen extensions installed"),
    SM_DBCSENABLED,          TEXT ("SM_DBCSENABLED"),         
                              TEXT ("Double-Byte Char Set enabled"),
    SM_CMOUSEBUTTONS,        TEXT ("SM_CMOUSEBUTTONS"),       
                              TEXT ("Number of mouse buttons"),
    SM_SECURE,              TEXT ("SM_SECURE"),               
                              TEXT ("Security present flag"),
    SM_CXEDGE,              TEXT ("SM_CXEDGE"),               
                              TEXT ("3-D border width"),
    SM_CYEDGE,              TEXT ("SM_CYEDGE"),               
                              TEXT ("3-D border height"),
    SM_CXMINSPACING,        TEXT ("SM_CXMINSPACING"),         
                              TEXT ("Minimized window spacing width"),
    SM_CYMINSPACING,        TEXT ("SM_CYMINSPACING"),         
                              TEXT ("Minimized window spacing height"),
    SM_CXSMICON,            TEXT ("SM_CXSMICON"),             
                              TEXT ("Small icon width"),
    SM_CYSMICON,            TEXT ("SM_CYSMICON"),             
                              TEXT ("Small icon height"),
    SM_CYSMCAPTION,          TEXT ("SM_CYSMCAPTION"),         
                              TEXT ("Small caption height"),
    SM_CXSMSIZE,            TEXT ("SM_CXSMSIZE"),             
                              TEXT ("Small caption button width"),
    SM_CYSMSIZE,            TEXT ("SM_CYSMSIZE"),             
                              TEXT ("Small caption button height"),
    SM_CXMENUSIZE,          TEXT ("SM_CXMENUSIZE"),           
                              TEXT ("Menu bar button width"),
    SM_CYMENUSIZE,          TEXT ("SM_CYMENUSIZE"),           
                              TEXT ("Menu bar button height"),
    SM_ARRANGE,              TEXT ("SM_ARRANGE"),             
                              TEXT ("How minimized windows arranged"),
    SM_CXMINIMIZED,          TEXT ("SM_CXMINIMIZED"),         
                              TEXT ("Minimized window width"),
    SM_CYMINIMIZED,          TEXT ("SM_CYMINIMIZED"),         
                              TEXT ("Minimized window height"),
    SM_CXMAXTRACK,          TEXT ("SM_CXMAXTRACK"),           
                              TEXT ("Maximum draggable width"),
    SM_CYMAXTRACK,          TEXT ("SM_CYMAXTRACK"),           
                              TEXT ("Maximum draggable height"),
    SM_CXMAXIMIZED,          TEXT ("SM_CXMAXIMIZED"),         
                              TEXT ("Width of maximized window"),
    SM_CYMAXIMIZED,          TEXT ("SM_CYMAXIMIZED"),         
                              TEXT ("Height of maximized window"),
    SM_NETWORK,              TEXT ("SM_NETWORK"),             
                              TEXT ("Network present flag"),
    SM_CLEANBOOT,            TEXT ("SM_CLEANBOOT"),           
                              TEXT ("How system was booted"),
    SM_CXDRAG,              TEXT ("SM_CXDRAG"),               
                              TEXT ("Avoid drag x tolerance"),
    SM_CYDRAG,              TEXT ("SM_CYDRAG"),               
                              TEXT ("Avoid drag y tolerance"),
    SM_SHOWSOUNDS,          TEXT ("SM_SHOWSOUNDS"),           
                              TEXT ("Present sounds visually"),
    SM_CXMENUCHECK,          TEXT ("SM_CXMENUCHECK"),         
                              TEXT ("Menu check-mark width"),
    SM_CYMENUCHECK,          TEXT ("SM_CYMENUCHECK"),         
                              TEXT ("Menu check-mark height"),
    SM_SLOWMACHINE,          TEXT ("SM_SLOWMACHINE"),         
                              TEXT ("Slow processor flag"),
    SM_MIDEASTENABLED,      TEXT ("SM_MIDEASTENABLED"),       
                              TEXT ("Hebrew and Arabic enabled flag"),
    SM_MOUSEWHEELPRESENT,    TEXT ("SM_MOUSEWHEELPRESENT"),   
                              TEXT ("Mouse wheel present flag"),
    SM_XVIRTUALSCREEN,      TEXT ("SM_XVIRTUALSCREEN"),       
                              TEXT ("Virtual screen x origin"),
    SM_YVIRTUALSCREEN,      TEXT ("SM_YVIRTUALSCREEN"),       
                              TEXT ("Virtual screen y origin"),
    SM_CXVIRTUALSCREEN,      TEXT ("SM_CXVIRTUALSCREEN"),     
                              TEXT ("Virtual screen width"),
    SM_CYVIRTUALSCREEN,      TEXT ("SM_CYVIRTUALSCREEN"),     
                              TEXT ("Virtual screen height"),
    SM_CMONITORS,            TEXT ("SM_CMONITORS"),           
                              TEXT ("Number of monitors"),
    SM_SAMEDISPLAYFORMAT,    TEXT ("SM_SAMEDISPLAYFORMAT"),   
                              TEXT ("Same color format flag")
} ;

---

Heres the Actual Program:

Code:

---

/*-----------------------------------------------
    SYSMETS1 -- System Metrics Display Program 1
-----------------------------------------------*/

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

LRESULT CALLBACK WndProc(HWND, UINT, WPARAM, LPARAM);

int WINAPI WinMain(HINSTANCE hInstance, HINSTANCE hPrevInstance, PSTR szCmdLine, int iCmdShow)
{
    static TCHAR szAppName[]=TEXT("Sysmets1");
    HWND hwnd;
    MSG msg;
    WNDCLASS wndclass;
   
    wndclass.style = CS_HREDRAW | CS_VREDRAW;
    wndclass.lpfnWndProc = WndProc;
    wndclass.cbClsExtra = 0;
    wndclass.cbWndExtra = 0;
    wndclass.hInstance = hInstance;
    wndclass.hIcon = LoadIcon(NULL, IDI_APPLICATION);
    wndclass.hCursor = LoadCursor(NULL, IDC_ARROW);
    wndclass.hbrBackground = (HBRUSH) (COLOR_WINDOW+1);
    wndclass.lpszMenuName = NULL;
    wndclass.lpszClassName = szAppName;
   
    if(!RegisterClass(&wndclass))
    {
        MessageBox(NULL, TEXT("This Program Requires Windows NT!"), szAppName, MB_ICONERROR);
        return 0;
    }
   
    hwnd=CreateWindow(szAppName, TEXT("Get System Metrics No. 1"),
                      WS_OVERLAPPEDWINDOW,
                      CW_USEDEFAULT, CW_USEDEFAULT,
                      CW_USEDEFAULT, CW_USEDEFAULT,
                      NULL, NULL, hInstance, NULL);
   
    ShowWindow(hwnd, iCmdShow);
    UpdateWindow(hwnd);
   
    while(GetMessage(&msg, NULL, 0, 0))
    {
        TranslateMessage(&msg);
        DispatchMessage(&msg);
    }
    return msg.wParam;
}

LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    static int cxChar, cxCaps, cyChar;
    HDC hdc;
    int i;
    PAINTSTRUCT ps;
    TCHAR szBuffer[10];
    TEXTMETRIC tm;
   
    switch(message)
    {
        case WM_CREATE:
            hdc=GetDC(hwnd);
            GetTextMetrics(hdc, &tm);
            cxChar=tm.tmAveCharWidth;
            cxCaps=(tm.tmPitchAndFamily & 1 ? 3 : 2)* cxChar / 2;
            cyChar=tm.tmHeight + tm.tmExternalLeading;
            ReleaseDC(hwnd, hdc);
            return 0;
        case WM_PAINT:
            hdc=BeginPaint(hwnd, &ps);
            for(i=0; i<NUMLINES; i++)
            {
                TextOut(hdc, 0, cyChar * i, sysmetrics[i].szLabel, lstrlen(sysmetrics[i].szLabel));
               
                TextOut(hdc, 22 * cxCaps, cyChar * i, sysmetrics[i].szDesc, lstrlen(sysmetrics[i].szDesc));
               
                SetTextAlign(hdc, TA_RIGHT | TA_TOP);
                TextOut(hdc, 22 * cxCaps +40 * cxChar, cyChar * i, szBuffer, wsprintf(szBuffer, TEXT ("%5d"),
                        GetSystemMetrics(sysmetrics[i].iIndex)));
                SetTextAlign(hdc, TA_LEFT | TA_TOP);
            }
            EndPaint(hwnd, &ps);
            return 0;
        case WM_DESTROY:
            PostQuitMessage(0);
            return 0;
    }
    return DefWindowProc(hwnd, message, wParam, lParam);
}

---

Thanks for any help you can give, maybe i just need some libraries or something, thanks!

PS- Im running Windows XP Home Edition, here are some of the errors:

C:\DOCUME~1\Douglas\LOCALS~1\Temp\ccWAbaaa.o(.text +0xdc0) In function `Z7WndProcP6HWND__jjl':
[Linker error] undefined reference to `GetTextMetricsA@8'
[Linker error] undefined reference to `TextOutA@20'
[Linker error] undefined reference to `SetTextAlign@8'

Thanks again!

Anyone? I was thinking maybe VB has some libraries that my DevC++ Doesnt? Please any help you can give, i cant move on until i get this one working. If i do move on i cant be sure that the next program will or will not work. Thanks again!

You need to link to GDI32.lib

Quote:

---

I think its probably because im useing Dev C++ instead of VC++. Am i missing libraries or something?

---

VC++ automatically links GDI32.lib.

To link with it in Dev-C++, add it in Project Options or maybe Compiler options, I don't remember which.

Thanks guys i appreciate it! How do i include it? I am assuming i dont use #include because that didnt work. I found the file (libgdi32.a) but how do i get it into the code? Thanks!

EDIT: Ok, i got it to work by doing things in a project. My quick (last) question is: Will i have to do a Project everytime i want to use gdi32? I suppose i wont be able to just click new file and write up some code i will have to do so in a project, oh well, at least it works! :D Thanks!