使用子窗口引起的奇怪异常
本帖最后由 AnisHan 于 2022-4-20 20:54 编辑如题，我使用了WIN32API中的子窗口 “scrollbar”
但是我想用窗口子类实现自己处理一部分消息，于是我用GetWindowLongPtr更换了窗口子类的WndProc，如果CreateWindow里面x，y with height都填0 就没事 子窗口也不会显示
一旦我调用MoveWindow让子窗口出现就会出异常，当CreateWindow 的x，y with height直接就设置好值也会出异常
代码如下 hin是全局变量表示程序实例句柄，ScrollPR是ScrollBar的原窗口过程
十分感谢
LRESULT CALLBACK WndProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam)
{
static RECTrect;
static int cxChar, cyChar, cyClient, cxClient;
HDC hdc;
PAINTSTRUCTps;
int i;
LPDRAWITEMSTRUCT pdis;
TCHAR szBuffer;
static HWND ScrollBar;
static int pos;
switch (message)
{
case WM_CREATE:
cxChar = LOWORD(GetDialogBaseUnits());
cyChar = HIWORD(GetDialogBaseUnits());
ScrollBar = CreateWindow(
TEXT("scrollbar"),
NULL,
WS_CHILD | WS_VISIBLE | SBS_VERT | WS_TABSTOP,
0, 0, 0, 0,
hwnd,
(HMENU)1,
hin,
NULL
);
SetScrollRange(ScrollBar, SB_CTL, 0, 100, FALSE);
SetScrollPos(ScrollBar, SB_CTL, 0, FALSE);
ScrollPR = GetWindowLongPtr(ScrollBar, GWLP_WNDPROC);
SetWindowLongPtr(ScrollBar, GWLP_WNDPROC, (LONG)ScrollProc);
return 0;
return 0;
case WM_SIZE:
rect.left = 24 * cxChar;
rect.top = 2 * cyChar;
rect.right = LOWORD(lParam);
rect.bottom = HIWORD(lParam);
MoveWindow(ScrollBar, 10, 10, 20, 200, FALSE);
return 0;
case WM_PAINT:
hdc = BeginPaint(hwnd, &ps);
EndPaint(hwnd, &ps);
return 0;
case WM_DESTROY:
PostQuitMessage(0);
return 0;
}
return DefWindowProc(hwnd, message, wParam, lParam);
}
LRESULT CALLBACK ScrollProc(HWND hwnd, UINT message, WPARAM wParam, LPARAM lParam) {
MessageBeep(0);
TCHAR szBuffer;
wsprintf(szBuffer, TEXT("%d"), GetLastError());
MessageBox(hwnd, szBuffer, NULL, MB_OK);
switch (message)
{
case WM_KEYDOWN:
MessageBeep(0);
break;
default:
break;
}
return CallWindowProc(ScrollPR, hwnd, message, wParam, lParam);
}
想设置悬赏，大佬们怎么弄 通过翻MSDN我找到了解决方法，而且清华大学翻译的太草了叫窗口子类，结果搜不到，台湾翻译窗口子类话还贴心的附上了英文window subclassing
解决：SetWindowLongPtr(ScrollBar, GWLP_WNDPROC, (LONG_PTR)ScrollProc);
还有那个击键消息的翻译太草了，速速把译者请来我要和译者击♂剑
台译的按键消息 一点基情都没有
页:
[1]