各位高手!
小弟用如下方法可以在桌面上直接创建按钮
但是创建出的按钮不得到相应就像command消息不进消息循环一样,
想知道为什么,
和如何使它得到响应.hwndButton[i] = CreateWindow ( TEXT("button"),
"BS_PUSHBUTTON",
WS_CHILD | WS_VISIBLE | button [i].iStyle,
cxChar,cyChar * (1 + 2 * i),
20 * cxChar, 7 * cyChar / 4,
0x00000134, (HMENU) i,
((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
///////////////////////////////////////////////////以下是WndProc
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HWND hwndButton[NUM] ;
static RECT rect ;
static TCHAR szTop[] = TEXT ("message wParam lParam"),
szUnd[] = TEXT ("_______ ______ ______"),
szFormat[] = TEXT ("%-16s%04X-%04X %04X-%04X"),
szBuffer[50] ;
static int cxChar, cyChar ;
HDC hdc ;
PAINTSTRUCT ps ;
int i ;
switch (message)
{
case WM_CREATE :
cxChar = LOWORD (GetDialogBaseUnits ()) ;
cyChar = HIWORD (GetDialogBaseUnits ()) ;
for (i = 0 ; i < NUM ; i++)
hwndButton[i] = CreateWindow ( TEXT("button"),
button[i].szText,
WS_CHILD | WS_VISIBLE | button[i].iStyle,
cxChar,cyChar * (1 + 2 * i),
20 * cxChar, 7 * cyChar / 4,
0x00000134, (HMENU) i,
((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
return 0 ;
case WM_PAINT :
InvalidateRect (hwnd, &rect, TRUE) ;
hdc = BeginPaint (hwnd, &ps) ;
SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
SetBkMode (hdc, TRANSPARENT) ;
TextOut (hdc, 24 * cxChar, cyChar, szTop, lstrlen (szTop)) ;
TextOut (hdc, 24 * cxChar, cyChar, szUnd, lstrlen (szUnd)) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DRAWITEM :
case WM_COMMAND :
ScrollWindow (hwnd, 0, -cyChar, &rect, &rect) ;
hdc = GetDC (hwnd) ;
SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
TextOut (hdc, 24 * cxChar, cyChar * (rect.bottom / cyChar - 1),
szBuffer,
wsprintf (szBuffer, szFormat,
message == WM_DRAWITEM ? TEXT ("WM_DRAWITEM") :
TEXT ("WM_COMMAND"),
HIWORD (wParam), LOWORD (wParam),
HIWORD (lParam), LOWORD (lParam))) ;
ReleaseDC (hwnd, hdc) ;
ValidateRect (hwnd, &rect) ;
break ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
小弟用如下方法可以在桌面上直接创建按钮
但是创建出的按钮不得到相应就像command消息不进消息循环一样,
想知道为什么,
和如何使它得到响应.hwndButton[i] = CreateWindow ( TEXT("button"),
"BS_PUSHBUTTON",
WS_CHILD | WS_VISIBLE | button [i].iStyle,
cxChar,cyChar * (1 + 2 * i),
20 * cxChar, 7 * cyChar / 4,
0x00000134, (HMENU) i,
((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
///////////////////////////////////////////////////以下是WndProc
LRESULT CALLBACK WndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static HWND hwndButton[NUM] ;
static RECT rect ;
static TCHAR szTop[] = TEXT ("message wParam lParam"),
szUnd[] = TEXT ("_______ ______ ______"),
szFormat[] = TEXT ("%-16s%04X-%04X %04X-%04X"),
szBuffer[50] ;
static int cxChar, cyChar ;
HDC hdc ;
PAINTSTRUCT ps ;
int i ;
switch (message)
{
case WM_CREATE :
cxChar = LOWORD (GetDialogBaseUnits ()) ;
cyChar = HIWORD (GetDialogBaseUnits ()) ;
for (i = 0 ; i < NUM ; i++)
hwndButton[i] = CreateWindow ( TEXT("button"),
button[i].szText,
WS_CHILD | WS_VISIBLE | button[i].iStyle,
cxChar,cyChar * (1 + 2 * i),
20 * cxChar, 7 * cyChar / 4,
0x00000134, (HMENU) i,
((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
return 0 ;
case WM_PAINT :
InvalidateRect (hwnd, &rect, TRUE) ;
hdc = BeginPaint (hwnd, &ps) ;
SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
SetBkMode (hdc, TRANSPARENT) ;
TextOut (hdc, 24 * cxChar, cyChar, szTop, lstrlen (szTop)) ;
TextOut (hdc, 24 * cxChar, cyChar, szUnd, lstrlen (szUnd)) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DRAWITEM :
case WM_COMMAND :
ScrollWindow (hwnd, 0, -cyChar, &rect, &rect) ;
hdc = GetDC (hwnd) ;
SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
TextOut (hdc, 24 * cxChar, cyChar * (rect.bottom / cyChar - 1),
szBuffer,
wsprintf (szBuffer, szFormat,
message == WM_DRAWITEM ? TEXT ("WM_DRAWITEM") :
TEXT ("WM_COMMAND"),
HIWORD (wParam), LOWORD (wParam),
HIWORD (lParam), LOWORD (lParam))) ;
ReleaseDC (hwnd, hdc) ;
ValidateRect (hwnd, &rect) ;
break ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
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1. 这个WNDPROC是谁的WNDPROC?
2. 桌面是什么意思? DESKTOP? 但根据你createwindow()的参数来看,明明是有父窗口的麻,其句柄是0x00000134.
3. 0x00000134这个句柄到底是谁的?
4. 既然使有BUTTON类,那么一般说来你只有在它的父窗口上处理消息.当button被点击时,父窗口收到WM_COMMAND清息.
5. 为什么在你的WNDPROC中WM_COMMAND和WM_DRAWITEM的处理是共用的,WM_COMMAND可是个极复杂的消息啊!
这是用spy++查出来得
button[i].szText,
WS_CHILD | WS_VISIBLE | button[i].iStyle,
cxChar,cyChar * (1 + 2 * i),
20 * cxChar, 7 * cyChar / 4,
0x00000134, (HMENU) i,//替换成hwnd,
((LPCREATESTRUCT) lParam)->hInstance,
你可以用GetWindowLong获得桌面的处理过程。进行子类化。
#include <windows.h>struct
{
int iStyle ;
TCHAR * szText ;
}
button[] =
{
BS_PUSHBUTTON, TEXT ("PUSHBUTTON"),
BS_DEFPUSHBUTTON, TEXT ("DEFPUSHBUTTON"),
BS_CHECKBOX, TEXT ("CHECKBOX"),
BS_AUTOCHECKBOX, TEXT ("AUTOCHECKBOX"),
BS_RADIOBUTTON, TEXT ("RADIOBUTTON"),
BS_3STATE, TEXT ("3STATE"),
BS_AUTO3STATE, TEXT ("AUTO3STATE"),
BS_GROUPBOX, TEXT ("GROUPBOX"),
BS_AUTORADIOBUTTON, TEXT ("AUTORADIO"),
BS_OWNERDRAW, TEXT ("OWNERDRAW")
} ;#define NUM (sizeof button / sizeof button[0])LRESULT CALLBACK WndProc (HWND, UINT, WPARAM, LPARAM) ;
LRESULT CALLBACK CldWndProc (HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)int WINAPI WinMain (HINSTANCE hInstance, HINSTANCE hPrevInstance,
PSTR szCmdLine, int iCmdShow)
{
static TCHAR szAppName[] = TEXT ("BtnLook") ;
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) 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 ("Button Look"),
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 HWND hwndButton[NUM] ;
static RECT rect ;
static TCHAR szTop[] = TEXT ("message wParam lParam"),
szUnd[] = TEXT ("_______ ______ ______"),
szFormat[] = TEXT ("%-16s%04X-%04X %04X-%04X"),
szBuffer[50] ;
static int cxChar, cyChar ;
HDC hdc ;
PAINTSTRUCT ps ;
int i ;
switch (message)
{
case WM_CREATE :
cxChar = LOWORD (GetDialogBaseUnits ()) ;
cyChar = HIWORD (GetDialogBaseUnits ()) ;
for (i = 0 ; i < NUM ; i++)
{hwndButton[i] = CreateWindow ( TEXT("button"),
button[i].szText,
WS_CHILD | WS_VISIBLE | button[i].iStyle,
cxChar,cyChar * (1 + 2 * i),
20 * cxChar, 7 * cyChar / 4,
GetDesktopWindow(), (HMENU) i,
((LPCREATESTRUCT) lParam)->hInstance, NULL) ;
SetWindowLong(hwndButton[0],GWL_WNDPROC,WndProc);
//ShowWindow (0x00000134, SW_SHOW);
//UpdateWindow(hwndButton[i]);
}
//UpdateWindow(0x00000134); return 0 ; case WM_SIZE :
rect.left = 24 * cxChar ;
rect.top = 2 * cyChar ;
rect.right = LOWORD (lParam) ;
rect.bottom = HIWORD (lParam) ;
return 0 ;
case WM_PAINT :
InvalidateRect (hwnd, &rect, TRUE) ;
hdc = BeginPaint (hwnd, &ps) ;
SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
SetBkMode (hdc, TRANSPARENT) ;
TextOut (hdc, 24 * cxChar, cyChar, szTop, lstrlen (szTop)) ;
TextOut (hdc, 24 * cxChar, cyChar, szUnd, lstrlen (szUnd)) ;
EndPaint (hwnd, &ps) ;
return 0 ;
case WM_DRAWITEM :
case WM_COMMAND :
ScrollWindow (hwnd, 0, -cyChar, &rect, &rect) ;
hdc = GetDC (hwnd) ;
SelectObject (hdc, GetStockObject (SYSTEM_FIXED_FONT)) ;
TextOut (hdc, 24 * cxChar, cyChar * (rect.bottom / cyChar - 1),
szBuffer,
wsprintf (szBuffer, szFormat,
message == WM_DRAWITEM ? TEXT ("WM_DRAWITEM") :
TEXT ("WM_COMMAND"),
HIWORD (wParam), LOWORD (wParam),
HIWORD (lParam), LOWORD (lParam))) ;
ReleaseDC (hwnd, hdc) ;
ValidateRect (hwnd, &rect) ;
break ;
case WM_DESTROY :
PostQuitMessage (0) ;
return 0 ;
}
return DefWindowProc (hwnd, message, wParam, lParam) ;
}
1. 你需要在DESKTOP上建按钮.
2. 你需要按钮有动作.
3. 你要在哪里显示? (即TEXTOUT到哪里去?)
4. 什么时候销毁这些按钮?回答问题3,4,我帮你改.
程序结束时销毁按钮
WIN32的程序不会自动退出的,因为你有个WHILE()无限循环,只有某个事件导致了WM_QUIT的出现才会使程序退出.
我曾经做过一个全仿照WINDOWS界面程序,我将自己的新建的假的开始按纽替换了WINDOWS真正的开始按纽,然后在我自己的程序里响应消息弹出菜单。
我就是用MSG HOOK做的。不过具我所知,还有好多其它方法,但大都是与HOOK有关,只不过HOOK类型不同罢了!
关于这方面有一个示例代码,相对比较复杂一点,是别人写的,在VC知识库可以下载到。它好象用的是API HOOK你去看看吧!