获取资源文件中定义的对话框大小

Question

我需要确定资源文件中定义的对话框客户区的大小。

GetClientRect将设计大小剪裁为桌面大小。我需要按照屏幕单位设计的尺寸。我发现this它声称从对话框资源检索大小，但不幸的是它使用MFC。

我打开对话框并有HWND，它是ID。如何在不使用MFC的情况下以屏幕单位获得设计尺寸？

Answer 1

SIZE GetDialogSize(INT nResourceId, BOOL bApproximateCalcMethod = FALSE, LPCTSTR strDllName = NULL) 
{ 

    SIZE dlgSize = {0}; 
    HINSTANCE hModule = 0; 

    if(strDllName != NULL) 
     hModule= ::LoadLibrary(strDllName);    
    else 
     hModule = ::GetModuleHandle(NULL); 

    HRSRC hRsrc = ::FindResource(hModule, MAKEINTRESOURCE(nResourceId), RT_DIALOG); 

    HGLOBAL hTemplate = ::LoadResource(hModule, hRsrc); 

    DLGTEMPLATE* pTemplate = (DLGTEMPLATE*)::LockResource(hTemplate); 

    if (bApproximateCalcMethod) // the approximate method of calculating 
    { 
     LONG dlgBaseUnits = GetDialogBaseUnits(); 
     int baseunitX = LOWORD(dlgBaseUnits), baseunitY = HIWORD(dlgBaseUnits); 
     dlgSize.cx = MulDiv(pTemplate->cx, baseunitX, 4); 
     dlgSize.cy = MulDiv(pTemplate->cy, baseunitY, 8); 
    } 
    else // the accurate method of calculation 
    { 
     HWND hDlg = ::CreateDialogIndirect(0, pTemplate, NULL, DialogProc);   
     RECT rc = {0}; 
     ::GetWindowRect(hDlg, &rc); 
     ::DestroyWindow(hDlg); 

     dlgSize.cx = rc.right - rc.left; 
     dlgSize.cy = rc.bottom - rc.top; 
    } 

    UnlockResource(hTemplate); 
    ::FreeResource(hTemplate); 

    if(strDllName != NULL) 
     ::FreeLibrary(hModule); 

    return dlgSize; 
}