一、LONG GetWindowLong( HWND hWnd, // handle to window int nIndex // offset of value to retrieve);
二、系统颜色。用系统颜色作为控件颜色,可以使软件界面跟系统更加和谐。
void CWindowsDisignDlg::OnDrawItem(int nIDCtl, LPDRAWITEMSTRUCT lpDrawItemStruct)
{
// TODO: Add your message handler code here and/or call default
if (nIDCtl == IDC_BUTTON18)
{
FillRect(lpDrawItemStruct->hDC,
&lpDrawItemStruct->rcItem,(HBRUSH)GetStockObject(LTGRAY_BRUSH));
if (lpDrawItemStruct->itemState & ODS_SELECTED)
{
FillRect(lpDrawItemStruct->hDC,
&lpDrawItemStruct->rcItem,(HBRUSH)GetStockObject(DKGRAY_BRUSH));
}
if (lpDrawItemStruct->itemState & ODS_FOCUS)
{
FillRect(lpDrawItemStruct->hDC,
&lpDrawItemStruct->rcItem,(HBRUSH)GetStockObject(GRAY_BRUSH));
}
::DrawText(lpDrawItemStruct->hDC,"自绘按钮自绘按钮自绘按钮自绘按钮",32,
&lpDrawItemStruct->rcItem,DT_CENTER | DT_WORDBREAK | DT_NOCLIP | DT_EXPANDTABS) ;
}
else
CDialog::OnDrawItem(nIDCtl, lpDrawItemStruct);
}
四、为子窗口设置窗口过程:
SetWindowLong(hwnd,GWL_WNDPROC,(LONG)ChildWndProc);
LRSULT CALLBACK ChildWndProc(HWND,UINT message,WPARAM,LPARAM);
五、获取系统环境变量:
GetEnvironmentStrings
FreeEnvironmentStrings
GetEnvironmentVariable