如何动态更改应用程序的图标?

[sdf123321]

我有个VC程序,想要根据读取配置文件的图标文件名称,找到图标文件,根据图标文件来决定应用程序文件的图片,请问如何实现?

[jerry]

改变EXE文件的图标? 那就有点难了.不过一个办法是给EXE创建一个连接. 可以在创建的时候改变连接的图标

[jerry]

MSDN 的例子，创建快捷方式并改变图标

/*PARAMETERS
fname_to_create_link = (e.g.) "c:\\mytextfile.txt"
lnk_fname = (e.g.) "yourname.lnk"
*/

void CreateLinkThenChangeIcon(LPTSTR fname_to_create_link,
LPTSTR lnk_fname)
{
HRESULT hres;
IShellLink *psl = NULL;
IPersistFile *pPf = NULL;
WORD wsz[256];
TCHAR buf[256];
int id;
LPITEMIDLIST pidl;

hres = CoCreateInstance( CLSID_ShellLink,

NULL,
CLSCTX_INPROC_SERVER,
IID_IShellLink,
(LPVOID*)&psl);
if(FAILED(hres))
goto cleanup;
hres = psl->QueryInterface(IID_IPersistFile, (LPVOID*)&pPf);
if(FAILED(hres))
goto cleanup;
hres = psl->SetPath(fname_to_create_link);
if(FAILED(hres))

goto cleanup;
//place the shortcut on the desktop
SHGetSpecialFolderLocation(hwnd, CSIDL_DESKTOP, >pidl);

SHGetPathFromIDList(pidl, buf);

lstrcat(buf,"\\");
lstrcat(buf,lnk_fname);

MultiByteToWideChar(CP_ACP, 0, buf, -1, wsz, MAX_PATH);

hres = pPf->Save(wsz, TRUE);

if(FAILED(hres))

goto cleanup;

GetSystemDirectory(buf, 256);

lstrcat(buf,"\\shell32.dll");

hres = psl->SetIconLocation(buf, 1);

if(FAILED(hres))

goto cleanup;

hres = psl->GetIconLocation(buf, 256, &id);

if(FAILED(hres))

goto cleanup;

pPf-&Save(wsz, TRUE);

cleanup:

if(pPf)

pPf->Release();

if(psl)

psl->Release();

}

[Bible_Chou]

// Win32的

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

int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,

PSTR szCmdLine, int iCmdShow)

{

TCHAR szAppName[] = TEXT ("IconDemo") ;

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 (hInstance, MAKEINTRESOURCE (IDI_ICON)) ;

wndclass.hCursor = LoadCursor (NULL, IDC_ARROW) ;

wndclass.hbrBackground = GetStockObject (WHITE_BRUSH) ;

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 ("Icon Demo"),

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 ;

}

[Bible_Chou]

上面其实就是在注册窗口类的时候直接载入自己想要的图标。
wndclass.hIcon = LoadIcon (hInstance, MAKEINTRESOURCE (IDI_ICON)) ;

[折腾_苏州]

::SendMessage(this->m_hWnd,WM_SETICON,ICON_SMALL,(LPARAM)LoadIcon(NULL,IDI_QUESTION));

[handsomerun]

给窗口发送

WM_SETICON
This message is sent by an application to associate a new big or small icon with a window.

WM_SETICON wParam = (WPARAM)(BOOL) fType;
lParam = (LPARAM)(HICON) hicon;
Parameters
fType
Specifies the type of icon being set. It is one of the following values:
Value Description
ICON_BIG Sets the large icon for the window.
ICON_SMALL Sets the small icon for the window.




hicon
Handle to the new large or small icon. If this parameter is NULL, the icon indicated by fType is removed.


发送这个消息就可以了

[折腾_苏州]

HANDLE h = LoadImage(AfxGetResourceHandle(),"C:\\Burn.ico",IMAGE_ICON,0,0,LR_LOADFROMFILE);
::SendMessage(this->m_hWnd,WM_SETICON,ICON_SMALL,(LPARAM)h);

[Seu_why]

::SendMessage(AfxGetMainWnd->m_hWnd,WM_SETICON,ICON_SMALL,(LPARAM)hIcon);

[jerry]

在主框架窗口的 OnCreate函数内

m_hIcon = AfxGetApp()->LoadIcon(....);
SetIcon(m_hIcon, TRUE);
SetIcon(m_hIcon, FALSE);

m_hIcon 即是你从文件读取的图标。

[sdf123321]

这个我知道,我是想改变应用程序保存在硬盘上的文件的图标

[折腾_苏州]

有个UpdateResource API可以更换资源，可以从别的exe中挖资源过来
http://kb.csdn.net/.net/Articles/200509/62bb93ea-9db7-4693-9034-3f5051ff13c0.html

[tanyaliji]

LPARAM)LoadIcon(NULL,IDI_QUESTION

[hhyytt]

SetIcon(LoadIcon(0,id), TRUE);