C++ UpdateLayeredWindow

TheShadowAE

Ich hab Probleme mit C++ beim updaten von einem Layered Fenster.
Die Funktion UpdateLayeredWindow wird nämlich obwohl windows.h included ist nicht gefunden:

Code

D:\Progen\C++\Meine\Dev-C++\Projekte\main.cpp In function `int WinMain(HINSTANCE__*, HINSTANCE__*, CHAR*, int)': 
86 D:\Progen\C++\Meine\Dev-C++\Projekte\main.cpp `UpdateLayeredWindow' undeclared (first use this function) 
  (Each undeclared identifier is reported only once for each function it appears in.) 
 D:\Progen\C++\Meine\Dev-C++\Projekte\Makefile.win [Build Error]  [main.o] Error 1

Mein Code:

Spoiler anzeigen

Code

#include <windows.h>




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


// Make the class name into a global variable
char szClassName[ ] = "WindowsApp";


int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)


{
    HWND hwnd;               // This is the handle for our window
    MSG messages;            // Here messages to the application are saved
    WNDCLASSEX wincl;        // Data structure for the windowclass


    // The Window structure
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      // This function is called by windows
    wincl.style = CS_DBLCLKS;                 // Catch double-clicks
    wincl.cbSize = sizeof (WNDCLASSEX);


    // Use default icon and mouse-pointer
    wincl.hIcon = LoadIcon (NULL, IDI_WINLOGO);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 // No menu
    wincl.cbClsExtra = 0;                      // No extra bytes after the window class
    wincl.cbWndExtra = 0;                      // structure or the window instance
    //Use Windows's default color as the background of the window
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;


    // Register the window class, and if it fails quit the program
    if (!RegisterClassEx (&wincl))
        return 0;


        int x=0,y=0,w=100,h=100;

    //The class is registered, let's create the program
    hwnd = CreateWindowEx (
           WS_EX_LAYERED,       // Extended possibilites for variation
           szClassName,         // Classname
           "Windows App",       // Title Text
           WS_SYSMENU, // default window
           x,       // Windows decides the position
           y,       // where the window ends up on the screen
           w,                 // The programs width
           h,                 // 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
           );

    if (!hwnd) MessageBox(NULL,"Fehler","Kein Fenster",MB_OK|MB_ICONERROR);


    // Make the window visible on the screen
    ShowWindow (hwnd, nFunsterStil);
 //   ShowWindow( hwnd, SW_HIDE );  // unsichtbar                                 //hier
      HDC dc=GetDC(hwnd);
      HDC cdc=CreateCompatibleDC(dc);
      POINT p;
      p.x=x;
      p.y=y;
      BLENDFUNCTION blend;
      blend.SourceConstantAlpha=255;
      blend.AlphaFormat=1;
      HBITMAP bmp;
      bmp=CreateCompatibleBitmap(cdc,w,h);
      SelectObject(cdc,bmp);
      for (int xx=0; xx<=100; xx++)
      {
          for (int yy=0; yy<=100; yy++)
          {
              SetPixel(cdc,xx,yy,0xFF00FF00);
          }
      }


      SIZE sz={100,100};
      BOOL k=UpdateLayeredWindow(hwnd,dc,NULL,&sz,cdc,&p,0,&blend,2);
      if (!k) MessageBox(NULL,"UpdateLayeredWindow","Fehler",MB_OK);
      DeleteObject(bmp);
      DeleteDC(cdc);
      ReleaseDC(hwnd,dc);




    // Run the message loop. It will run until GetMessage() returns 0
    while (GetMessage (&messages, NULL, 0, 0))
    {
        // Translate virtual-key messages into character messages
        TranslateMessage(&messages);
        // Send message to WindowProcedure
        DispatchMessage(&messages);
    }


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




// This function is called by the Windows function DispatchMessage() 


LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  // handle the messages
    {
        case WM_CLOSE:
             DestroyWindow(hwnd);
             break;
        case WM_DESTROY:
             PostQuitMessage(0);
             break;
        default:                      // for messages that we don't deal with
            return DefWindowProc (hwnd, message, wParam, lParam);
    }


    return 0;
}

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Hoffe ihr könnt mir helfen.

PS:
@mods
Wenn das hier nicht Offtopic sondern Hilfestellungen pls verschieben

Marthog

Das liegt daran, dass der Dev-C++ etwas älter ist.
Wenn du ganz an den Anfang des Programms

Code

#undef _WIN32_WINNT
#define _WIN32_WINNT 0x0500

schreibst, findet er bei mir die Funktion.
Allerdings gibt es noch einige Link-errors.

Mit MV-C++ funktioniert es (vorrausgesetzt, es gehört so, dass das Fenster komplett unsichtbar ist)

TheShadowAE

Danke, einen Linkerror gibt es dann nicht mehr, aber UpdateLayeredWindow gibt False zurück

TheShadowAE

Hm ich habe gegooglet, dass UpdateLayeredWindow nicht mit SetPixel klapt, aber er findet die gdiplus.h nicht, weiß jemand warum?
Die windows.h ist vorher included

TheShadowAE

Ok, das mit GDIplus hingekriegt, aber UpdateLayredWindow gibt nach wie vor False zurück

Spoiler anzeigen

C

#include <windows.h>
#include <gdiplus.h>




using namespace Gdiplus;




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


// Make the class name into a global variable
char szClassName[ ] = "WindowsApp";


int WINAPI WinMain (HINSTANCE hThisInstance,
                    HINSTANCE hPrevInstance,
                    LPSTR lpszArgument,
                    int nFunsterStil)


{
    HWND hwnd;               // This is the handle for our window
    MSG messages;            // Here messages to the application are saved
    WNDCLASSEX wincl;        // Data structure for the windowclass


    // The Window structure
    wincl.hInstance = hThisInstance;
    wincl.lpszClassName = szClassName;
    wincl.lpfnWndProc = WindowProcedure;      // This function is called by windows
    wincl.style = CS_DBLCLKS;                 // Catch double-clicks
    wincl.cbSize = sizeof (WNDCLASSEX);


    // Use default icon and mouse-pointer
    wincl.hIcon = LoadIcon (NULL, IDI_WINLOGO);
    wincl.hIconSm = LoadIcon (NULL, IDI_APPLICATION);
    wincl.hCursor = LoadCursor (NULL, IDC_ARROW);
    wincl.lpszMenuName = NULL;                 // No menu
    wincl.cbClsExtra = 0;                      // No extra bytes after the window class
    wincl.cbWndExtra = 0;                      // structure or the window instance
    //Use Windows's default color as the background of the window
    wincl.hbrBackground = (HBRUSH) COLOR_BACKGROUND;


    // Register the window class, and if it fails quit the program
    if (!RegisterClassEx (&wincl))
        return 0;


        int x=0,y=0,w=100,h=100;

    //The class is registered, let's create the program
    hwnd = CreateWindowEx (
           WS_EX_LAYERED,       // Extended possibilites for variation
           szClassName,         // Classname
           "Windows App",       // Title Text
           WS_SYSMENU, // default window
           x,       // Windows decides the position
           y,       // where the window ends up on the screen
           w,                 // The programs width
           h,                 // 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
           );

    if (!hwnd)
    {
              MessageBox(NULL,"Kein Fenster","Fehler",MB_OK|MB_ICONERROR);
              exit(1);
    }


    // Make the window visible on the screen
    ShowWindow (hwnd, nFunsterStil);
 //   ShowWindow( hwnd, SW_HIDE );  // unsichtbar                                 //hier
      HDC dc=GetDC(hwnd);
      HDC cdc=CreateCompatibleDC(dc);
      POINT p;
      p.x=x;
      p.y=y;
      BLENDFUNCTION blend;
      blend.SourceConstantAlpha=255;
      blend.AlphaFormat=1;

      GdiplusStartupInput gdiplusStartupInput;
      ULONG_PTR           gdiplusToken;  
      GdiplusStartup(&gdiplusToken, &gdiplusStartupInput, NULL);
      Graphics bgra(hwnd);
      Bitmap bmp(100,100,&bgra);
      Graphics *gra=Graphics::FromImage(&bmp);
      gra->Clear(Color(0,0,0,0));
      Pen pen(Color(255,0,255,0));
      gra->DrawLine(&pen,0,0,100,100);
      HBITMAP hbmp;
      bmp.GetHBITMAP(Color(0,0,0,0),&hbmp);
      SelectObject(cdc,hbmp);


      SIZE sz={100,100};
      BOOL k=UpdateLayeredWindow(hwnd,dc,NULL,&sz,cdc,&p,0,&blend,2);
      if (!k)
      {
             MessageBox(NULL,"UpdateLayeredWindow","Fehler",MB_OK|MB_ICONERROR);
             exit(1);
      }
      DeleteObject(hbmp);
      DeleteDC(cdc);
      ReleaseDC(hwnd,dc);
      GdiplusShutdown(gdiplusToken);




    // Run the message loop. It will run until GetMessage() returns 0
    while (GetMessage (&messages, NULL, 0, 0))
    {
        // Translate virtual-key messages into character messages
        TranslateMessage(&messages);
        // Send message to WindowProcedure
        DispatchMessage(&messages);
    }


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




// This function is called by the Windows function DispatchMessage() 


LRESULT CALLBACK WindowProcedure (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
    switch (message)                  // handle the messages
    {
        case WM_CLOSE:
             DestroyWindow(hwnd);
             break;
        case WM_DESTROY:
             PostQuitMessage(0);
             break;
        default:                      // for messages that we don't deal with
            return DefWindowProc (hwnd, message, wParam, lParam);
    }


    return 0;
}

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Wär wirklich nett wenn mir jemand helfen könnte, ich verzweifel bald daran

PS:
Ich benutze jetz Visual Studio(c++)

Nightraven

Hi, ich kann dir bei deinem Problem leider nicht helfen, ich kann dir aber empfehlen, dass du dir mal Qt anschaust. Qt ist ein Plattform unabhängiges C++ UI Framework und im nicht Kommerziellen Einsatz kostenlos. http://qt.nokia.com/

Vielleicht wirst du damit ja glücklicher ;-).

MfG Night